4. REGION: Western

5. CLASSIFICATION TITLE, SERIES, AND GRADE: Geophysicist, 1313, 14

6. DATE OF ENTRANCE ON DUTY: March 1, 1992

7. DATE OF LAST PROMOTION: July, 1996

8. DATE OF LAST RESEARCH GRADE PANEL REVIEW: April, 1999

9. EDUCATION

University of California at Berkeley, 1/79-6/82
Berkeley, California
A.B., Geophysics, 1982

Scripps Institution of Oceanography, 9/82-6/87
University of California at San Diego
La Jolla, California
Ph.D., Earth Sciences, 1987

10. TECHNICAL TRAINING RECEIVED (Include post-graduate and substantive technical courses not included under 9.)

11. PROFESSIONAL EXPERIENCE

a. PRESENT ASSIGNMENT (Summarize the project(s) with which you are currently associated, your role in the project(s), and the major source of funding.)

1993 - Present

Geophysicist, So. California Earthquake MegaProject (Supervisor, Project Chief, Lucy Jones, formerly Jim Mori)

I am the initiator and investigator for several ongoing research projects within the Southern California MegaProject (described broadly in scope in item #1 below). External funding includes: 1) OFA support from the Nuclear Regulatory Commission to analyze the spatial variability of ground motion and the nature of radiated seismic energy (FY1994-1997), 2) field support from the Incorporated Institutions for Seismology for a deployment of eight PASSCAL instruments in the Long Valley, California region (1998), and 3) SCEC support for a specific outreach project (FY2000).

1) Independent research efforts focused on high-resolution determination of source, path, and site effects and observational characterization of strong ground motion in sediment-filled basins. Utilize state-of-the-art data from a range of sources including portable and permanent instrumentation to address 1) specific earthquakes (or ground motions from future earthquakes) of societal importance to Southern California, and 2) general scientific issues which bear on a better understanding of earthquake processes and ground motions.

2) Deployment of portable digital seismic instrumentation (usually involving responsibility for design of specific experiments) following significant regional earthquakes in collaboration with other members of the Team and, where appropriate, in coordination with outside researchers and institutions. Processing and analysis of data collected.

3) Support for the Southern California Seismic Network (/Trinet) and Outreach. Respond to public and media inquires as requested; make earthquake information available and accessible to the public via the World Wide Web and other venues. As part of the duty seismologist rotation for the network, respond while on duty to check and disseminate information on any potentially felt earthquake in the Southern California region.

Geophysicist, Central U.S. MegaProject (Project Chiefs: Buddy Schweig and Joan Gomberg)

A reevaluation of the 1811-1812 New Madrid sequence. I initiated this project, which originally focused on improving the magnitude estimates for the principal New Madrid mainshocks and large aftershocks, and have remained the lead P.I. on it since its inception. The project also includes analysis of site response in the central and eastern United Statest, and investigation of large aftershocks and remotely triggered earthquakes associated with the sequence.

b. PREVIOUS PROFESSIONAL POSITIONS (List all research and/or technical positions
held in the last 10 years and significant positions held prior to 10 years ago, in reverse
chronological order. Use the format below for each position.)

March 1992 - 1993

Geophysicist, Branch of Engineering Seismology and Geology, (Supervisor, Tom Holzer).

Sole Pasadena representative of (dearly departed) Branch of Earthquake Seismology and Geology (Project Chief for individual project). Responsible for designing and overseeing the deployment of portable seismic instruments following significant regional earthquakes; responsible for developing research program focusing on investigations of seismic ground motions, including studies of both wave propagation and large earthquake sources. Research interests focused on mainshock and aftershocks of the 1992 Joshua Tree and Landers earthquakes: The instrument deployment following the April 1992 Joshua Tree earthquake has ultimately resulted in the collection of a unique set of seismic data, including dense array strong motion recordings of the Landers mainshock.

1988 - 1992

Postdoctoral Researcher/Associate Research Scientist, Lamont-Doherty Geological Observatory.

Investigated attenuation of seismic waves and the effect of near-site geology on ground motions in eastern North America, initiated collaborative studies on site response in Italy with funding from NSF-International, led the seismic hazard component of the IRIS/PASSCAL aftershock deployment following the 1989 Loma Prieta earthquake. Co-advised two graduate students.

1987 - 1988

Postdoctoral Researcher, Scripps Institution of Oceanography.

With a Lawrence-Livermore mini-grant on which I was sole P.I., I investigated attenuation in Nevada from regional earthquakes and chemical explosions recorded on LLNL-operated stations. I showed that earthquakes and explosions tended to be characterized by differences in high frequency content that could be understood in terms path-dependent attenuation effeffects for sources at different depths.

1982 -1987

Graduate Student/Research Assistant, Scripps Institution of Oceanography.

Research focused on the effects of attenuation of earthquake ground motions using strong motion data from several regions within California and weak motion data from the Anza seismic array. Investigated the depth and frequency-dependence of attenuation; the former using inverse methods. I also tested the inverse method that I developed using synthetic seismograms generated with a wave-number integration method, and investigated the feasibility of synthesizing earthquake ground motions at sites where no observations are available.

a. RECENT ACCOMPLISHMENTS (Describe research contributions and impact of accomplishments during the past 5 years or since last promotion, whichever period is shorter. Limit to 2 pages.)

1. A new look at the 1811-1812 New Madrid Sequence .
While reading about the New Madrid sequence out of general professional interest, I became convinced that it was time to take another look at the contemporary accounts of the earthquakes--accounts that had been used to assign Modified Mercalli Intensities, and then magnitudes, for these tremendously important events. My re-analysis (publications 54, 57, 58, 59, 61, 62, and 66 plus abstracts) yields substantially lower magnitudes (M7.0-7.5) for the three principal mainshocks than those previously accepted. These results are more consistent with estimates derived from other, more indirect evidence such as geomorphology, and, if accepted/adopted, would have a substantial effect on the probabilistic seismic hazard in the New Madrid Seismic Zone. I also used intensity data to constrain site response along the major river valleys in the central and eastern U.S.; my results suggest that, relative to California, site response in the eastern/central US could play an especially critical role in controlling seismic hazard. I have also found evidence that two of the New Madrid mainshocks produced remote triggered earthquakes, which has important implications for both seismic hazard and the physical mechanism associated with triggered events (publications 61, 66, and A54). Finally, I have investigated observed and predicted shaking and damage from the 26 January, 2001 Bhuj, India, earthquake, which may represent an analog for the largest New Madrid events. My "ShakeMap" respresentation of observed intensities, as estimated from media reports, has been used by researchers world-wide.

2. Improvements in methodology to independently resolve source, path, and site effects .

A critical, long-standing problem in ground motions research has been the independent determination of earthquake source properties, attenuation of seismic waves, and amplification of ground motions in sedimentary basins and valleys. The issue is of importance both for our "academic" understanding of the earthquake source and for the prediction of ground motions from future earthquakes. after my promotion to GS-14 in 1996, my research efforts focused on development of the "Multiple-empirical Green's function method" to determine source, attenuation, and site response from earthquake recordings at individual stations. The basic method was presented in publication #50 (JGR, 1997) and further tested with a larger data set from the Coso Geothermal field in California (publ. 53). By virtue of both the existence of a high-quality borehole network monitoring the field and the presence of substantial variations in attenuation associated with the geothermal region, this data set presented a unique opportunity to further test and develop the MEGF method.

I developed the MEGF method and the computer codes to implement it. I was sole author on the 1997 JGR author, which analyzed data from instruments I deployed during the 1995 Ridgecrest, California sequence. My work on Coso data utilizes a set of clustered earthquakes previously identified by Professor Lees. The results (BSSA, 1999) illustrate the success of the MEGF method in determining source, attenuation, and site terms independently. In particular, improvement in resolution of attenuation--traditionally an ellusive parameter to estimate--are dramatic.

Since 1999 I have also applied high-resolution methods to analyze the source properties of remotely triggered and volcanic earthquakes--to my knowledge, the first investigations of these types. The results of these investigations provide constraints for physical models of earthquake triggering, which I am currently exploring.

3. Quantification of variability in earthquake ground motion

In collaboration with (then) University of Southern California seismologist Ned Field, I analyzed data recorded on a quasi-dense array of 20 stations deployed following the 1994 Northridge, California earthquake. This data set, from a deployment orchestrated by Jim Mori, provided the opportunity for a first-ever look at ground motion variability over a spatial-scale of 0.5-5 km. Quantifying variability over this range of scales is a critical issue as the seismological community considers the feasability of microzonation. That is, over how fine a scale can one meaningfully predict variations in ground motions, given the observed variability of ground motions at a given site from different earthquakes? And, if you have a ground motion estimate from a certain location, what is the size of the area for which it can be considered representative? The results of these investigations were published in two papers (separated in publication time by the vagaries of the publication process, not the timing of the research itself): #47, and #48. The former paper presents the average source-to-source variation in response spectra at each individual site as well as station-to-station variation; the latter paper presents the average waveform coherence between the array sites. Both studies analyzed a set of events that I identified and completed basic processing on; Dr. Field took the lead on publication #47 (with modest contributions from me on approach and writing) and I took the lead on the coherence investigation.

Since 2001 my work on site response has focused on analysis of empirical amplification factors at TriNet sites. This work is now one of the key components of a Site Characterization task on which I am Task Leader. Our goal is to fully characterize site response at TriNet sites, which will allow us to both investigate the process of site response and to understand the corrections needed to fully exploit TriNet data for source studies.

4. Consideration of Long-Term Hazard estimation for the greater Los Angeles Region

Although not protracted in scope, I have been involved with research concerning the assessment of long-term seismic hazard in the greater Los Angeles region, including issues such as the maximum magnitude ("Mmax") expected for this region and understanding the consequences of different assumptions on hazard estimates. The consequences of work published in 1995 were explored in an opinion article in Seismological Research Letters in 1996. In this later paper, I argued that assumptions made in the construction of regional hazard maps produced by the Southern California Earthquake Center regarding Mmax resulted in a model for earthquake recurrence that was inconsistent with constraints from paleoseismic investigations. I pointed out that the assumptions made in the SCEC model had the effect of substantially reducing predicted ground motions along the San Andreas fault, well below a level that would generally be considered appropriate.

At the time these papers were published, the debate regarding Mmax was quite heated, with arguments in favor of values as low as perhaps M7 (for greater L.A.) and as high as M8.5. My 1995 paper suggests a value of M7.8 as consistent with both geologic evidence and mathematical models for long-term seismicity. Since 1995-96, I believe the debate has begun to converge twoards a value not far from this one.

b. OTHER CAREER ACCOMPLISHMENTS (Briefly list other major research contributions during remainder of career. Limit to 2 pages.)

1. Aftershock Deployments following significant regional earthquakes

It has been observed that scientific progress is collective by nature. That is, as the collective understanding of a field grows, it becomes obvious what the "next step" is. Therefore, any individual's research contributions are often closely paralleled or tracked by those of other investigators. While not to denegrate the importance of individual research contribution (mine or anybody else's), I take a special measure of pride in the deployments of portable digital seismic instruments that I have organized and led. There is an undeniable uniqueness to the contribution of a data set that would not have existed if not for one's own efforts (since individual earthquakes are most definitely not repeatable experiments). Such deployments result in data that often proves of great utility to other researchers; and, hopefully, to oneself as well.

In addition to the STORMS deployment of 1998, I have been involved with the following major deployments (and many more minor ones, sometimes in a support capacity when called upon):

October, 1989 - Deployment of five instruments in the vicinity of the failed Nimitz Freeway following the Loma Prieta earthquake. Field work done in collaboration with scientists from Lamont and the U.S. Geological Survey in Menlo Park. Support from NCEER, IRIS/PASSCAL, and ultimately the external NEHRP program. Analysis of these data is presented in publications #17, 18, 27, and 33. Results of these studies have also found their way into a number of textbooks, including the latest edition of "Physics," by Halliday, Resnick, and walker.

April, 1992 - Deployment of eight instruments following the 4/23/92 M6.1 Joshua Tree, California earthquake. When many of these instruments recorded the M7.2 Landers earthquake of 6/28/92, these instruments served as a pre-deployed array to record aftershocks of the Landers sequence as well. These data are analyzed in publications 30, 37, and 42.

January, 1994 - Deployment of a small, 4-element dense array in the vicinity of the 1/17/94 M6.7, Northridge, California earthquake. (Publication 40)

August, 1995 - Deployment of three instruments to record aftershocks of the 1995 Ridgecrest, California sequence. (Publications 46, 50).

2. Quantification and Understanding of Site Response

Many of my research efforts have focused on the issue of site response. That is, either the classic amplification of waves in low-impedence near-surface layers or the more complicated amplification by three-dimensional sediment-filled basins and valleys.

At Lamont, I helped develop techniques that use ambient noise, or microtremors, to investigate site response. Publications 16 and 20 present some of the first results from North America suggesting that a site response signal could be seen in microtremor data. These publications result from a deployment that I led in Flushing Meadows, New York. This line of research was further developed with 1) application of dense-array recordings of ambient noise to constrain near-surface shear-wave velocity structure (publications 26 and 29); 2) ambient noise measurements in other areas (26, 28, 29, 41, 43); and 3) the in-depth comparison of site response estimation techniques done by Lamont graduate student Ned Field as the backbone of his PhD thesis.

My 1989 deployment around the Nimitz Freeway was focused on site response in the context of a particular forensic investigation of a failed structure.

Another focus of my investigations into site response has involved investigation of wave propagation in three-dimensional basins. These include a study in Sunnyvale, California following the 1989 Loma Prieta earthquake (on which Art Frankel took the lead), and one in Northridge, California. Somewhat surprisingly, the key result of the latter study did not involve direct investigation of the properties of converted surface waves generated within sedimentary valleys, but the observation of an enormous variability in character of ground motions at a given site from earthquakes occurring in different places. That is, while the ground motions at individual sites were often dominated by converted surface waves, ground motions from some earthquakes recorded at the same sites were markedly more simple.

Simulations of three-dimensional basin response by U.C. Santa Barbara seismologist Kim Olsen have revealed a similarly large variation in ground motions corresponding to different source locations. My results from the Northridge dense array, although for smaller earthquakes, provide perhaps the first observational corroboration that this result, which is of potentially vital importance for ground motion prediction.

The results from the Northridge dense array directly motivated subsequent research on variability of ground motions discussed above.

3. Quantification of Attenuation

The culmination of this long-standing research interest is described in section 12. However, my development of the MEGF method effectively built on analysis and insights developing during my research career since its very inception. Although the "vision" for my very first publication (Anderson and Hough, 1984) came from my thesis advisor, Dr. John Anderson, I am very proud to have been associated with a paper that has gone on to be the most widely-cited article to have been published in BSSA during all of 1984. My subsequent, more independent research into attenuation (publications 4, 5, 6, 9, 12, 23, 50) have continued to build on the concepts and model introduced by the 1984 paper.

13. SCIENTIFIC LEADERSHIP (Describe your significant scientific and management contributions demonstrating leadership which advanced the USGS mission and programs. (Limit to 1 page.)

In addition to my leadership with instrument deployments discussed elsewhere, I have served when called upon on various committees vital to the mission of the USGS:

9/92 Member, internal USGS Southern California review panel.

4/93 Member, Research Peer Review Panel, USGS

7/93 Member, Internal USGS Southern California review panel

6/93-1996: USGS GEOS management committee member

3/94 Research Peer Review Panel, Branch of Seismology, USGS

7/94 Member, Internal USGS Northern California review panel

11/95 Internal USGS Process and Theory review panel

6/99-12/99 Member, Search Committee for GS12/13 hire, Pasadena Field Office, USGS

11/99 Editor/compiler of collectively-authored preliminary (SRL) report on the Hector Mine earthquake

2/00 Member, Research Peer Review Panel, Earthquake Hazard Team

6/00-present Member, RELM working group for earthquake probabilities

3/01 Chair, Research Peer Review Panel, Earthquake Hazard Team

5/01 Invited participant, ATC workshop on ground motion mapping, San Francisco, CA

14. SCIENTIFIC AND PUBLIC SERVICE

a. CURRENT MEMBERSHIPS IN PROFESSIONAL SOCIETIES. (List organizations and include elective offices held and significant committee assignments; give dates.)

American Geophysical Union, 1987 - present

1994 - Seismology Representative, Task force to revise AGU index terms

Seismological Society of America (1985-present)

1998 - 2001 - Board of Directors

2000 - Chairperson, Awards Committee
2001 - member, Officers Nominating Committee


2001 - 2004 - Board of Directors

2001 - Publications committee (ex officio since 8/2001)

b. TECHNICAL PRESENTATIONS (List authored and coauthored abstracts and papers given at scientific meetings, conferences, and workshops; give dates and meetings; signify (INVITED, PRESENTED) as appropriate after each entry.)

A1. Hough, S.E., J.G. Anderson, and H. Patton (1988). Attenuation in western Nevada: Preliminary results from earthquake and explosion sources, Trans. Am. Geophys. Union 69, 404

A2.. Hough, S.E. and K.H. Jacob (1988). Ambient noise investigations of site response in Flushing Meadows, NY, Seismological Research Letters 59.

A3.. Jacob, K., P. Friberg, Y. Liu, R. Busby and S. Hough (1988). The NCEER ground motion research program: Initial results with focus on the Eastern U.S., Alaska, Instrumention, and Data Base, Trans. Am. Geophys. Union 69, 1321.

A4.. Jacob, K, S.E. Hough, J.C. Gariel, and J. Armbruster (1989). Seismological input for uniform hazards response spectra for New York City, Trans. Am. Geophys. Union 70, 1192.

A5.. Field, E.H., S.E. Hough, and K.H. Jacob (1989). Sediment amplification in Flushing Meadows, New York: Application of an ambient noise method, Trans. Am. Geophys. Union 70, 1192.

A6. Hough, S.E. and L. Seeber (1989). Seismological constraints on source properties of the Mb=4.0, 1985 Ardsley, New York, earthquake: A characteristic rupture?, Trans. Am. Geophys. Union 70, 1226

A7. Hough, S.E., P.A. Friberg, R.W. Busby, E.H. Field, and K.H. Jacob (1990). High and Low-Frequency ground motions on sediment sites in Oakland following the October 17, 1989 Loma Prieta earthquake,Seismological Research Letters 61, 50.

A8.. Hough, S.E. (1990). Estimating the Fractal Dimension of Topographic Profiles, Trans. Am. Geophys. Union 71, 466.

A9. Hough, S.E., L. Seeber, and J.G. Armbruster (1990). Rupture Dimensions of Intraplate Earthquakes,Trans. Am. Geophys. Union 71.

A10. Hough, S.E., L. Seeber, A. Rovelli, L. Malagnini, and A. DeCesare (1990). Ambient Noise and Weak Motion Excitation of Sediment Resonances: Results from the Tiber Valley, Italy, Trans. Am. Geophys. Union 71, 1475.

A11. Frankel, A., S. Hough, P. Friberg, and R. Busby (1990). Analyis and Modelling of Waveforms of Loma Prieta Aftershocks Recorded on a Dense Array in Sunnyvale,Trans. Am. Geophys. Union 71, 1456.

A12. Hajnal, Z., J. Park, and S.E. Hough (1990). Ambient noise and sediment resonances around New Haven, CT, Fall Meeting,Trans. Am. Geophys. Union 71, 1475.

A13. Field, E.H., K.H. Jacob, and S.E. Hough (1991). Earthquake site response estimation: A case study using aftershocks of the 1989 Loma Prieta earthquake, Trans. Am. Geophys. Union 72, 338.

A14. Hough, S.E., L. Seeber, A. Lerner-Lam, J.G. Armbruster, and H. Guo (1991). Empirical Green's function analysis of Loma Prieta aftershocks, Trans. Am. Geophys. Union 72, 341.

A15. Hough, S.E., H. Guo, A. Lerner-Lam, L. Seeber, and C. Scholz (1992). Stress drop scaling: Results from empirical Green's function analysis of Loma Prieta earthquakes, Seismological Res. Lett. 63, 24.

A16. Malagnini, L., A. Rovelli, S.E. Hough, and L. Seeber (1992). Array measurements of ambient noise in the Garigliano Valley, Seismological Res. Lett. 63, 41.

A17. Seeber, L, J.G. Armbruster, H. Guo, S. Hough, and A. Lerner-Lam (1992). The San Andreas fault at Loma Prieta from small earthquakes, Seismological Research Lett. 63, 63.

A18. Guo, H., A. Lerner-Lam, and S.E. Hough (1992). Empirical Green's function study of Loma Prieta aftershocks, Seismological Res. Lett. 63, 76.

A19. E. Gonzalez, K.M. Fischer, S.E. Hough, C. Nelson, X. Yang (1992). Site response in sediment-filled glacial valleys: A case study from Providence, RI, Trans. Am. Geophys. U. 73, 338.

A20. Guo, H., A. Lerner-Lam, D.W. Caress, and S. Hough (1992). Anomalous body wave attenuation in the mainshock region of the 1989 Loma Prieta earthquake, Trans. Am. Geophys. U. 73, 368.

A21. Hough, S.E. and L.M. Jones (1992). b-value variations throughout the Joshua Tree/Landers aftershock sequences, Trans. Am. Geophys. U. 73, 381.

A22. Frankel, A., S. Hough, G. Glassmoyer, E. Sembera, C. Dietel, and L. Hwang (1992). Seismic response of the San Bernardino Valley to Landers-Big Bear aftershocks: Implications for seismic hazard to buildings, Trans. Am. Geophys. U. 73, 382.

A23. Hough, S.E., J. Mori, Y. Ben-Zion, E. Sembera, G. Glassmoyer, C. Mueller, L. Wennerberg, and S. Lydeen (1992). Near-field recordings of the Joshua Tree/Landers/Big Bear sequences on portable digital instruments: Aftershocks, foreshocks, mainshocks, aftershocks, Trans. Am. Geophys. U. 73, 393.

A24. Hough, S.E., J. Mori, E. Sembera, G. Glassmoyer, C. Mueller, and L. Wennerberg (1993). The Southern "Landers" surface rupture, Trans. Am. Geophys. U. 74.

A25. Jones, L.E. and S.E. Hough (1993). Rupture characteristics of the June 28, 1992 Big Bear sequence from TERRAscope records, Trans. Am. Geophys. U 74.

A26. Hough, S.E. and L.E. Jones (1993). The 1992 Landers Sequence: Putting the Pieces Together, Trans. Am. Geophys. U. 74, 429.

A27. Jones, L.E. and S.E. Hough (1993). Rupture characteristics of the June 28, 1992 Big Bear sequence from TERRAscope records, Trans. Am. Geophys. U. 74, 429.

A28. Hough, S.E. and D.S. Dreger (1994) Source parameters of the 4/23/92 M6.1 Joshua Tree mainshock and its aftershocks: Empirical Green's function analysis of TERRAscope and GEOS data, Seismological Reserach Letters 65.

A29. Cranswick, E., D. Overturf, S. Hough, and I.A. Abramovich, Direct recordings of ground motion rotation in San Bernardino, California, produced by a magnitude 5 earthquake, submitted, Seismological Research Letters 65 (Spring meeting, Seismological Society of America).

A30. Hough.S.E., D. Wald, C. Dietel, G. Glassmoyer, and E. Sembera (1994). Shake, Rattle, or Roll: On the variability of aftershock ground motions in Northridge, Califonria, Seismological Research Letters 65, A61

A31. Hough, S.E. (1994) Understanding the resolution limits of observation constraints on earthquake source properties, Trans. Am. Geophys. U. 75, 438.

A32. Hough, S.E. (1995). Earthquakes in the greater Los Angeles Region: A fractal distribution of rupture size? International Union of Geology and Geophysics, A382.

A33. Hough, S.E. (1995). Can you believe observation constraints on earthquake source scaling?, Trans. Am. Geophys. U. 76, 406.

A34. Field, E.H. and S.E. Hough (1995). Variability in PSV spectra across the Northridge semi-dense array, Trans. Am. Geophys. U. 76, 352.

A35. Hough, S.E. (1996). Multiple empirical Green's function analysis, American Geophysical Union 77, 520.

A36. Hough, S.E. (1997). On regional observations of earthquake source spectra, Seismological Research Letters 68, 293.

A37. Hough, S.E., J. Lees, and F. Monastero (1997). Source properties, attenuation, and fault zone waves at the Coso Geothermal field, Trans. Am. Geophys. U. 77, 680

A38. Hough, S.E., J. Lees, and F. Monastero (1998). Imaging attenuation at the Coso Geothermal Field, Seism. Res. Lett. 69, 170.

A39. Hough, S.E., R.S. Dollar, and P. Johnson (1998) STORMS, proc. annual meeting, Incorporated Research Institutions for Seismology, Santa Cruz, CA.

A40. Hough, S.E., P. Johnson, R.S. Dollar, M. Pitt, D. Hill, and R. Drake (1998). Analysis of non-tectonic events recorded on a portable array at Long Valley, CA: Is there signal in the noise? Trans. Am. Geophys. U. 78, 963.

A41. Johnson, P.A., L. Seeber, S.E. Hough (1998). Seismicity near Mammoth Lakes during the summer 1998, Trans. Am. Geophys. U. 78, 962.

A42. Hough, S.E. and R.S. Dollar (1999), The 1998 'Tom's Place' sequence southeast of Long Valley caldera: hints of magmatic involvement?, Seism. Res. Lett. 70.

A43. Hough, S.E., J.G. Armbruster, L. Seeber, and J.F. Hough (1999). On a consistent source model for the New Madrid Seismic Zone - New insight from old data, Trans. Am. Geophys. U. 79.

A44. Hough, S.E., R.S. Dollar and P. Johnson (1999), The 1998 earthquake sequence south of Long Valley caldera: hints of magmatic involvement?, proceedings, annual meeting of the Southern California Earthquake Center.

A45. Hough, S.E. and L. Seeber (1999). Triggered earthquakes nea the Salton Sea: Source characteristics and seismotectonic setting, Trans. Am. Geophys. U. 79.

A46. Hough, S.E. (2000), On the contribution from site response to earthquake hazard in the central and eastern United States, Seism. Res. Lett. 71.

A47. Hough, S.E., L. Seeber, and J.G. Armbruster (2000), The 1811-1812 New Madrid Earthquakes: Converging to a consistent view? Trans. Am. Geophys. U. 80.

A48. Hough, S.E. (2000), Inferring fault rupture length from early aftershock distributions: bridging the gap between big and small earthquakes, proceedings, annual meeting of the Southern California Earthquake Center.

A49. Hough, S.E (2000), Triggered earthquakes: A case study from 1812, Trans. Am. Geophys. U. 81.

A50. Hough, S.E. and H. Kanamori (2001), Remotely triggered earthquakes in interplate and intraplate regions: observations and interpretation, Seism. Res. Lett. 72, p 251.

A51. Hough, S.E. and S. Martin (2001), Intensity distribution of the January 26, 2001 Bhuj, India earthquake, Seism. Res. Lett. 72, p 396.

A52. Bendick, R., R. Bilham, E. Fielding, V. Gaur, S.E. Hough, G. Kier, M. Kulkarni, S. Martin, and M. Mukol (2001), Geodetic investigation of the January 26, 2001 Bhuj earthquake, Gujarat, India, Trans. Am. Geophys. U. 82, S261.

A53. Hough, S.E., S. Martin, R. Bilham, and G.M. Atkinson (2001), The January 26, 2001 Bhuj, India earthquake: Observed and predicted ground motions, Trans. Am. Geophys. U. 82.

A54. Hough, S.E., L. Seeber, and J.G. Armbruster (2001). Intraplate triggered earthquakes: observations and interpretation, Trans. Am. Geophys. U. 82.

A55. Yong, A., Hough, S.E., and H. Kanamori, Site response and site characterization of Trinet Sites, Seismological Research Letters, 2002 (BWTR 1/02)

A56. Hough, S.E. and S. Martin, Hazard from great intraplate earthquakes: new lessons from new data; new lessons from old data, Seismological Research Letters, 2002 (BWTR 1/02)

c. RENDERING SCIENTIFIC JUDGMENT (Include external scientific review panels, editorial boards, editorships, with dates. Include the capacity in which you served, e.g., chairperson, subcommittee chairperson, member, observer, expert consultant, etc.)

12/89 Invited presidor at session on Earthquake Source Determination, Fall meeting, AGU

12/91 Invited presidor at session on Strong Ground Motion, Fall Meeting, AGU

8/92 Member, external USGS Central U.S. review panel.

12/92 Invited presidor at session on Landers earthquake, Fall meeting, AGU

1/93-1/96 Associate Editor, Journal of Geophysical Research

5/93 Presidor and co-convener, session on Landers earthquake, Spring meeting, AGU

7/93 Member, External USGS Pacific Northwest review panel

1/94-9/94 Seismology representative on task force to review AGU index terms

6/94 Member, External USGS Pacific Northwest review panel

12/94 Invited presidor, Earthquake source scaling and dynamics session, Fall meeting, AGU

1/95-3/98 Seismology Section Editor, EOS, Transactions American Geophysical Union

6/97 Invited Convener, Earthquake studies session, IRIS workshop, Breckenridge, CO

3/98-3/01 Member, Board of Directors, Seismological Society of America

3/99-5/99 Member, TriNet Outreach Committee review panel

12/00 Invited presidor, Earthquake triggering session, Fall meeting, AGU

11/00-2001 Member, Search Committee for Seismological Research Letters Editor

3/01-3/04 Member, Board of Directors, Seismological Society of America

7/01-present Editor, Seismological Research Letters

11/01-present Member, IRIS subcommittee to develop IRIS/SSA Lectureship in Seismology

Students advised

1990-1994: Member of Ph.D. thesis committee of Lamont graduate student Edward Field (outside committee member 3/92-6/94) Thesis: Earthquake Site Response Estimation, Columbia University, 1994.

1992-1994: Member of PhD Orals committee of Lamont graduate student Hongsheng Guo (outside committee member, 3/92-94). Thesis: Source properties and attenuation structure determined from aftershocks of the 1989 Loma Prieta earthquake.

1995: Member, PhD thesis committee, Laura Jones, California Institute of Technology. Thesis: Characteristics of the June 28, 1992, Big Bear mainshock from TERRAscope data: Evidence for a multiple source event, 1995.

1995: Member, PhD examining committee, Andrew Feustel, Queens University, Kingston, Ontario. Thesis: Seismic attenuation in underground mines: measurement techniques and applications to site characterizations.

1998-1999: Member, Masters thesis committee, Suzanne Perry, University of Oregon, Eugene, Oregon

2001: Member, Masters thesis committee, Meghan Dokter, University of Memphis, Memphis, Tennessee

2001: Mentor, Stacey Martin, SCEC summer intern. Project: Observed and predicted shaking from the 2001 Bhuj, India earthquake.

2001: Mentor, Class of 7 "Gifted and Talented" High school students Institute for Educational Advancement summer program. Project: Earthquake Weather -- fact or fiction?

Scientific Lectures - Academic (Invited where noted, otherwise volunteered)

11/89 Invited seminar on field deployment and results following the 1989 Loma Prieta earthquake; Lamont-Doherty Geological Observatory weekly colloquem, Palisades, New York

6/90 Invited seminar on earthquake source studies, Memphis State University, Memphis, Tennessee

10/90 Invited seminar on site response, Brown University, Providence, Rhode Island

4/91 Invited seminar on earthquake source studies at University of Connecticut, Connecticut

9/91 Invited seminar on site response at Lawrence Livermore National Laboratory, Livermore, California.

4/92 Invited talk on Joshua tree earthquake and aftershock deployment, Istituto Nazionale di Geofisica, Rome, Italy.

7/92 Invited presentation on Joshua Tree/Landers earthquakes and aftershock deployment to representatives of the Nuclear Regulatory Committee, Menlo Park, CA

3/93 Invited seminar at Citrus Community College Women's History Month celebration, Azusa, California

7/93 Talk on results from analysis of Landers data, U.S.Geological Survey, Menlo Park, CA.

7/93 Seminar on results from analysis of Landers data, California Institute of Technology, Pasadena, California

9/93 Seminar on the Landers sequence, Lamont-Doherty Geological Observatory, Palisades, New York.

2/94 Presentation of results from Northridge earthquake aftershock deployment, Southern California Earthquake Center, Los Angeles, California

5/94 Invited talk on results from Northridge earthquake aftershock deployment Southern California Academy of Sciences, Irvine, California

7/94 Invited talk on earthquake source scaling, Southern California Earthquake Center , Los Angeles, California

8/94 Invited seminar on earthquake source scaling Scripps Institution of Technology, La Jolla, California

10/94 Invited seminar on Northridge earthquake, Long Beach State University, Long Beach, California

11/94 Invited seminar: Seismological perspectives on the Mojave Shear Zone, Geology Club, California Institute of Technology, Pasadena, California.

7/95 Invited talk on site effects, Workshop, Southern California Earthquake Center, Los Angeles, California

11/95 Invited seminar--Anatomy of an Earthquake Sequence, University of Oklahoma, Oklahoma City, Oklahoma

4/96 Invited talk on source/path/site effects, Lamont-Doherty Earth Observatory, Palisades, NY.

5/96 Seminar on source/path/site effects analysis, California Institute of Technology, Pasadena, California

7/96 Seminar on Northridge ground motion variability results, U.S. Geological Survey, Menlo Park, California

2/98 Invited seminar on source/attenuation studies, University of Southern California, Los Angeles, California

6/98 Invited seminar on determination of attenuation and site response, TRINET research seminar, California Institute of Technology, Pasadena, California

3/99 Seminar on earthquake activity at Long Valley, California, California Institute of Technology, Pasadena, California

6/99 Seminar on earthquake activity at Long Valley, California, Lamont-Doherty Earth Observatory, Palisades, New York

7/99 Seminar on the 1811/1812 New Madrid earthquakes, California Institute of Technology, Pasadena, CA.

10/99 Seminar on the 1811/1812 New Madrid earthquakes, University of Southern California, Los Angeles, CA.

11/99 Invited Seminar on the New Madrid earthquake sequence, Scripps Institution of Oceanography, La Jolla, California.

12/99 Invited Seminar on Ground Motion Research, Civil Engineering Department, University of Southern California , Los Angeles, California.

3/00 Seminar on New Madrid earthquake sequence, U.S. Geological Survey, Menlo Park, California.

3/00 Invited seminar on ground motion results from the New Madrid sequence, Civil Engineering Department, University of Southern California, Los Angeles, California.

6/00 Seminar on aftershocks and triggered earthquakes of the New Madrid sequence, California Institute of Technology, Pasadena, California.

11/00 Seminar on triggered earthquakes, California Institute of Technology, Pasadena, California

1/01 Seminar on triggered earthquakes, U.S. Geological Survey, Menlo Park

3/01 Invited seminar on triggered earthquakes, Geological Survey of Japan, Tsukuba, Japan

3/01 Invited seminar on triggered earthquakes, Japan Marine Science and Techology Center, Yokohama, Japan

3/01 Invited seminar on triggered earthquakes, Disaster Research Prevention Institute, Kyoto, Japan

5/01 Invited seminar on New Madrid earthquakes, Stanford University, Stanford, California.

6/01 Seminar on triggered earthquakes, Lamont-Doherty Earth Observatory, Palisades, New York

9/01 Invited seminar on triggered earthquakes, Geophysics Department, University of Southern California, Los Angeles

3/02 Invited seminar on Intraplate seismic hazard, California Institute of Technology

Invited Talks at Scientific Meetings and Symposia

5/90 Invited talk on fractal analysis of topography, American Geophysical Union, Baltimore, MD.

12/92 Invited talk on deployment of portable seismic instrumentation following the Landers earthquake, American Geophysical Union, San Francisco, CA.

5/93 Invited talk on Landers sequence, American Geophysical Union, Baltimore MD

4/94 Invited poster on results from Northridge earthquake aftershock deployment, Spring meeting, Seismological Society of America

11/94 Invited key speaker on 1992 Landers earthquake sequence, NATO Advanced Research Meeting, Moscow, Russia

9/95 Invited Talk on Northridge ground motion studies, Nuclear Regulatory Committee program review meeting, Memphis, Tennessee

3/96 Invitation (with partial travel support) to Crustal Studies Workshop in Moscow, Russia (not accepted--request for foreign travel denied)

6/97 Invited talk on aftershock deployments/studies, Annual Meeting, Incorporated Research Institutions for Seismology, Breckenridge, Colorado

9/97 Invited Talk on earthquake radiation, Nuclear Regulatory Committee Program Review meeting, Memphis, TN

11/98 Invited seminar on attenuation results from the Coso Geothermal Region, CA, China Lake Geothermal Program Annual Review Meeting , Las Vegas, Nevada

2/99 Invited talk on results of STORMS deployment, U.S. Geological Survey Annual Long Valley Meeting, Menlo Park, California

12/99 Invited poster on Hector Mine results, American Geophysical Union, San Francisco, CA

1/00 Invited talk on reevaluation of New Madrid earthquakes New Madrid Source Workshop, Center for Earthquake Research and Information, Memphis, Tennessee.

4/00 Invited talk on New Madrid, Special session on east coast hazard, American Geophysical Union, Washington DC.

6/00 Invited talk on New Madrid earthquakes, U.S. Geological Survey Central/Eastern U.S. Hazard Mapping Workship, St. Louis, Missouri.

4/01 Invited talk on triggered earthquakes, Seismological Society of America annual meeting, San Francisco, CA.

10/01 Invited lead talk on Bhuj earthquake, IMD/NSF-sponsored International Workshop on the Bhuj earthquake, New Delhi, India

12/01 Invited talk on Bhuj earthquake, American Geophysical Union San Francisco, CA.

f. SPECIAL ASSIGNMENTS (Name organization, group, dates, and nature of contribution of major activities in excess of 3 months.)

g. OTHER TECHNICAL ACTIVITIES (List technical assistance and unpublished reports not covered elsewhere; limit to significant accomplishments during the past 5 years.)

15. OUTREACH AND INFORMATION TRANSFER (List major activities and accomplishments to increase awareness of USGS scientific programs with partners, cooperators, and the media, including served data sets and development of metadata standards, technical information bulletins, videos, home page development, press releases, media interviews, etc.; limit to past 5 years. Do not duplicate entries under 14 or 17.)

Technical Information for General Public and Professionals: Lectures

6/93 Presentation on open research issues in site response to members of the Applied Technology Council

4/94 Invited talk on research, Association for Women in Science, Pasadena, California

4/95 Invited talk on earthquake hazard, City of Torrence disaster preparedness council

10/96 Invited panel presentation, expected distribution of earthquakes in Los Angeles Southern California Earthquake Center workshop on Seismic Zonation, Pasadena, CA

11/98 Invited talk on site response, CUREe-SCEC Course on the Earth Science-Engineering interface in seismic design, Los Angeles, California.

4/99 Talk on LA-area hazard and Mammoth Lakes unrest, Automatic Data Processing Corp., San Dimas, Ca

7/99 Invited panel member, Department of Interior FEW (Federally Employed Women) conference, Phoenix, Az

3/00 Expert consultant on New Madrid Seismic Zone, Factory Mutual Insurance Co., Rhode Island

4/00 Talk on Hector Mine earthquake, Automatic Data Processing Corp, San Dimas, Ca.

4/00 Talk on Earth science education for high school teachers, Carson, Ca.

11/00 Talk on 1811-1812 New Madrid Earthquakes, Association of Exploration Geologists, So. Calif. chapter

11/00 Tour of Seismo Lab for visiting delegation from Turkish Red Cross (Red Crescent)

4/01 Invited talk on 1/26/01 Bhuj, India earthquake, CUBE User's meeting, Caltech

11/01 Talk on "SeismoSleuthing", USGS Public Lecture Series, Pasadena

5/02 Invited public lecture and book signing, Los Angeles Natural History Museum

5/02 Invited public lecture and book signing, Denver Natural History Museumo

Understanding earthquakes makes for messy science, Los Angeles Times Op-ed , May 13, 1994.

Earthquakes--Californians rational risk, Pasadena Star News Op-ed, June 20, 1995

Still shocked by what comes after, Los Angeles Times Op-ed , May 4, 1997

Even Scientists don't know when to fold 'em, Los Angeles Times Op-ed, March 30, 1998

Big earthquakes, Predictions, and the New Millennium, commentary for USGS-Pasadena Web Page, Oct., 1999

The World is not coming to an end, Los Angeles Times Op-ed, Susan Hough and Lucile Jones, November 14, 1999. (Reprinted by the San Jose Mercury News, 11/18/99 and the Times of India)

Tales From the Front, column, Quarterly Newsletter, Southern California Earthquake Center, summer, 1998 - fall, 1999

Rewrote the Seismological Society of America's "Careers in Seismology" Web page, 2/2001.

The Aftershocks that Weren't, feature article, Natural History Magazine, March, 2001.

1886 Earthquake Studies ("GeoFizz" contribution), J.G. Armbruster and S.E. Hough Eos, Transactions American Geophysical Union, August, 2001.

A Whole Lot of Shaking Going On, Los Angeles Times Op-ed, Lucy Jones and Susan Hough, November 5, 2001.

Outreach (Education/Media) Talks and Other Presentations

1990:

Interview, "The 7.1 Experiment," Los Angeles Times Magazine

1992:

Earthquake awareness fair, Cerritos, California
Talk on seismic hazard to Covina Rotary Club, Covina, California
Talk on earthquakes and seismic hazard, Covina Hospital Earthquake awareness program, Covina California

Talk on earthquakes and seismic hazard, Institue for Environmental Sciences, Fullerton, California
Earthquake education program, Los Angeles County Girl Scout troop #59
Earthquake education program, Girl Scout Science Day program, California Institute of Technology, Pasadena, California
Earthquake education program for Wildflower Elementary School, San Dimas, California

1994:

Television interview on Northridge earthquake, Good Morning America
Participated in Open Options Panel: Sacred Heart School, La Canada, California
Talk on earthquakes and seismic hazard, Exxon Corporation, Thousand Oaks, California
Talk on seismic hazard, Minerological Society of Southern California, Arcadia, California
Tour of Caltech Seismology Lab for elementary school
Earthquake education program, Rio Hondo Elementary School, Arcadia, California
Presentation on Northridge earthquake, S. California Academy of Sciences, annual meeting.
Talk on seismic hazard, Institute for Environmental Sciences, Anaheim, California
Tour of Caltech Seismology Lab for general public
Talk on Northridge earthquake, Los Angeles Preservation Society, Pasadena, California

1995:

Invited keynote address, AAUW-sponsored conference for 8th grade girls, Redlands, California
Tours of the Caltech Seismo Lab for Girl Scout troops (2)
Interview, CBS evening news
Earth science program, Girl Scouts, Mount Wilson Vista Council
Earthquake fair, Parson's engineering, Pasadena, California
Talk on seismic hazard, Riviera Homeowners Association
Invited keynote address on seismic hazard, MUSES foundation, Los Angeles
Talk on Northridge earthquake, Arcadia Wilderness Park seminar series, Arcadia, California
Earthquake program, Girl Scouts, San Marino
Talk on earthquakes, Scripps Retirement home, Altadena, California

1996:

Talk on earthquake preparedness, Girl Scout Council of Long Beach
Earthquake Fair, Metropolitan Transit Authority, Los Angeles, California
Talk on earthquakes, Arcadia Wilderness Park seminar series, Arcadia, California
Earthquake program, Rio Hondo Elementary School, El Monte, California

1997:

Earthquake program, Longden Way Elementary School, Temple City, California
Science Career Day presentation, UC Extension program, Ventura, California
Earthquake demonstration, Girl Scout 85th Anniversary Celebration, Pomona, Ca
Earthquake talk, Montebello High School, Montebello, California
Earthquake talk, Upland Chamber of Commerce, Upland, California
Earthquake talk, Pacific Palisades Rotary Club, Pacific Palisades, California
Earthquake talk to Club Managers Association, California Institute of Technology

1998:

Talk on volcanoes, Marengo Elementary School, South Pasadena, California
Earthquake talk, San Gabriel Rotary Club, San Gabriel, Ca

1999:

Talk on volcanoes, Super Science Day at Marengo Elementary, South Pasadena, California
Geology presentation, San Gabriel Valley Cub Scouts
Featured interview, The Federal Page, Washington Post (8/26/99).
Radio interview with NPR, "All Things Considered."

2000:

Talks on earthquakes, Marengo Elementary, South Pasadena, California
Talk on earthquakes (7th grade), South Pasadena Middle School.
Earthquake talk, Evening Seminar Series, Arcadia Wilderness Park, Arcadia, California
Talk on earthquakes (honors physics classes), South Pasadena High School

2001:

Live TV interview on Indian earthquake, MSNBC national news
Live TV interviews (3) on Nisqually (Seattle) earthquake, MSNBC news
10-12 phone interviews with radio stations and wire services on Nisqually earthquake
One-hour live radio interview with KPCC (public radio), "AirTalk."
One-hour live radio interview with WTZY in Asheville, NC, "Heads up America"

2002:

Panel Member, UCLA Careers in Science Day
Earthquake talk, (150 6th graders) South Pasadena Middle School, South Pasadena, CA
Earthquake talk, (500 6th graders) Jefferson Middle School, San Gabriel, CA

Ongoing:

Telephone and in-person interviews with local media (radio, television, newspapers) and public on earthquakes and seismic hazard in Southern California.

16. INVENTIONS, PATENTS HELD (Include dates.)

17. HONORS, AWARDS, RECOGNITION, ELECTED MEMBERSHIPS (List and give dates and names of organization from which recognition was granted.)

1981 Atlantic Richfield Academic Excelence Award

1982 Graduation with honors, University of California at Berkeley

1997 U.S.G.S. Special Act Service Award (N.O.T.T. Cash Award) for Outreach.

1999 Outreach Award, Southern California Earthquake Center

1999 U.S.G.S. Star Award for response to Hector Mine Earthquake.

2000 U.S.G.S. Star Award for Peer Panel service

18. BIBLIOGRAPHY

a. PUBLISHED REPORTS (List non-abstract publications in chronological order with full citations, including journal papers, book chapters, books, proceedings, academic thesis, dissertation, USGS reports, maps, fact sheets, circulars, CD-ROMs, etc.)

1. Anderson, J.G. and S.E. Hough (1984). A model for the shape of the Fourier amplitude spectrum of acceleration at high frequencies, Bulletin of the Seismological Society of America 74, 1969-1994. (Citations: 153)

2. Backus, G. and S.E. Hough (1985). Some models of the magnetic field in western Europe from 1960 to 1980, Physics of the Earth and Planetary Interiors 39, 243-254. (Citations: 9)

3. Brune, J.N., W.R. Walter, K. Priestley, J. Fletcher, J. Berger, S.E. Hough, and T. Hanks (1986). Preliminary observations of 30 Hz P-wave spectra compared with omega-cubed and omega-square source models, Proceedings of workshop on research in high frequency seismology, Dallas, Texas.

4. Hough, S.E. (1987) The attenuation of high frequency seismic waves, PhD thesis, U. of California, San Diego. (Citations: 3)

5. Hough, S.E., J.G. Anderson, J. Brune, F. Vernon III, J. Berger, J. Fletcher, L. Haar, T. Hanks, and L. Baker (1988). Attenuation near Anza, California, Bulletin of the Seismological Society of America, 78, 672-691. (Citations: 55)

6. Hough, S.E. and J.G. Anderson (1988). High frequency spectra observed at Anza, California: Implications for Q structure, Bulletin of the Seismological Society of America 78, 692-707. Citations: 48)

7. Hough, S.E., A. Lerner-Lam, J.C. Gariel, P.A. Friberg, and K.H. Jacob (1989). Seismic ground motion and attenuation relationships in the eastern United States for seismic hazards estimation, v. 1, proceedings, Fifth International Conference on Structural Safety and Reliability, San Francisco, Aug. 7-11, 1989, A. H-S. Ang, et al., Eds, p 311-318. American Society of Civil Engineers, New York. (Citations: 1)

8. R.D. Borcherdt, N.C. Donovan, B.A. Bolt, D. Boore, M. Celebi, D. Eberhart-Phillips, T. Hall, S.E. Hough, A.F. Shakal, and R.V. Sharp (1989). Geoscience investigations of the earthquake of October 17, 1989 near the summit of Loma Prieta in the southern Santa Cruz Mountains, EERI reconnaissance report.

9. Hough, S.E., J.G. Anderson, and H.J. Patton (1989). Attenuation in western Nevada: Preliminary results from earthquake and explosion sources, Geophysical Research Letters 16, 207-210.

10. Hough, S.E. (1989). On the use of spectral methods for the determination of fractal dimension, Geophysical Research Letters 16, 673-676. (Citations: 25)

11. Hough, S.E., K. Jacob, and R. Busby (1989). Ground motions from a M=3.5 earthquake near Massena, New York: Evidence for the poor resolution of corner frequency from small events, Seismological Research Letters 60, 95-100. (Citations; 6)

12. Hough, S.E., K. Jacob, and P. Friberg (1989). The 11/25/88, M=6 Saguenay Earthquake near Chicoutimi, Quebec: Evidence for anisotropic wave propagation in northeastern North America, Geophysical Research Letters 16, 645-648. (Citations: 11)

13. Hough, S.E., K.H. Jacob and L. Seeber (1990). High frequency seismic wave propagation--from California to the New York Islands, 1989 Lamont-Doherty Geological Observatory yearbook.

14. Jacob, K.H., J.C. Gariel, J. Armbruster, S. Hough, P. Friberg, and M. Tuttle (1990). Site-specific ground motion estimates for New York City, Proceedings of the 4th US National Conference on Earthquake Engineering, Palm Springs, California, Palm Springs, California, 587-594.

15. Seeber, L., M. Tuttle, S. Hough, and J. Armbruster (1990). The November 25, 1988 Saguenay earthquake in Quebec Province and its implications for seismic hazard, Proceedings of International conference on Water Reactor Safety, A. Weiss, editor.

16. Field, E.H., S.E. Hough, and K.H. Jacob (1990). Using microtremors to assess potential earthquake site response: A case study in Flushing Meadows, New York City, Bulletin of the Seismological Society of America 80, 1456-1480. (Citations: 24)

17 Hough, S.E., R.D. Borcherdt, P.A. Friberg, R. Busby, E.F. Field, and K.H. Jacob (1990). Sediment-induced amplification and the collapse of the Nimitz freeway, Nature 344, 853-855. (Citations: 24)

18. Hough, S.E. (1990) Constraining sediment thickness in the San Francisco Bay area using observed resonances and P-to-S conversions, Geophysical Research Letters 17, 1469-1472. (Citations: 8)

19. Tuttle, M., S. Hough, L. Seeber, and K. Jacob (1990). The November 25, 1988 Saguenay, Quebec earthquake and its implications for liquefaction potential, Canadian Geotechnical Journal, 27, 579-589.

20. Hough, S.E., E.H. Field, and K.H. Jacob (1991). Using microtremors to assess site-specific earthquake hazard, Proceedings of the Fourth International Conference on Seismic Zonation, 385-392. (Citations: 3)

21. Hough, S.E., K.H. Jacob, and L. Seeber (1991). High frequency seismic wave propagation in northeastern North America, Seismological Research Letters 61. 193-208.

22. Hough, S.E., L. Seeber, and K.H. Jacob (1991). Comment on: A comparison of eastern North America ground motions with theoretical predictions, by G.M. Atkinson, Seismological Research Letters 62, 143-146. (Citations: 8)

23. Hough, S.E. and L. Seeber (1991). Seismological constraints on source properties of the m=4.0 Ardsley, New York earthquake: A characteristic rupture?, Journal of Geophysical Research 96, 18183-18196. (Citations: 6)

24. Hough, S.E., L. Seeber, A. Lerner-Lam, J.G. Armbruster, and H. Guo (1991). Empirical Green's function analysis of Loma Prieta aftershocks, Bulletin of the Seismological Society of America, 81, 1737-1753. (Citations: 24)

25. Frankel, A., S. Hough, P. Friberg, and R. Busby (1991). Observations of Loma Prieta aftershocks from a dense array in Sunnyvale, California, Bulletin of the Seismological Society of America 81, 1900-1922. (Citations: 40)

26. Hough, S.E., L. Seeber, A. Rovelli, L. Malagnini, and A. DeCesare (1992). Ambient Noise and weak motion excitation of sediment resonances: Results from the Tiber Valley, Italy, Bulletin of the Seismological Society of America. 82, 1186-1205. (Citations: 14)

27. Field, E.H., K.H. Jacob, and S.E. Hough (1992). Earthquake site response estimation: A weak motion case study, Bulletin of the Seismological Society of America 82, 2283-2308. (Citations: 19)

28. Fischer, K.M. and S.E. Hough (1992). Site response in Providence, Rhode Island: Preliminary results from ambient noise investigations, Seismological Research Letters 63, 525-532. (Citations: 8)

29. Malagnini, L., A. Rovelli, S.E. Hough, and L. Seeber (1993). Site amplification estimates in the Garigliano Valley, Central Italy, based on dense array measurements of ambient noise, Bull. Seism Soc. Am. 83, 1744-1755. (Citations: 9)

30. Hough, S.E., J. Mori, E. Sembera, G. Glassmoyer, C. Mueller, and S. Lydeen (1993). Southern surface rupture associated with the 1992 M7.4 Landers earthquake: Did it all happen during the mainshock?, Geophysical Research Letters 20, 2615-2618 (Citations: 15)

31. Sieh, K., L. Jones, E. Hauksson, K. Hudnut, D. Eberhart-Phillips, T. Heaton, S. Hough, K. Hutton, H. Kanamori, A. Lilje, S. Lindvall, S. McGill, J. Mori, C. Rubin, J. Spotila, J. Stock, H.K. Thio, J. Treiman, B. Wernicke, and Z. Zachariasen (1993). Near-field Investigations of the Landers Earthquake Sequence, April to July, 1992, Science. (Citations: 108)

32. Jones, L.E., S.E. Hough, and D.V. Helmberger (1993). Rupture process of the June 28, 1992 Big Bear earthquake, Geophysical Research Letters 20, 1907-1910. (Citations: 10)

33. Field, E.H., S.E. Hough, K.H. Jacob, and P.A. Friberg (1994). Earthquake site response in Oakland, California near the failed Nimitz freeway, U.S.Geological Survey Professional Paper 1551-A, Roger Borcherdt, ed, 169-180.

34. Frankel, A., S.E Hough, P.A. Friberg, and R. Busby (1994). Aftershock observations from a dense array in Sunnyvale, California, U.S. Geological Survey Professional Paper 1551-A, Roger Borcherdt, et, 181-196.

35. Guo, H., A. Lerner-Lam, S.E. Hough, and W. Menke (1997). Empirical Green's function study of Loma Prieta aftershocks: Part I, determination of stress drop, U.S.Geological Survey Professional Paper, P. Reasenberg, ed., 105-120.

36. Hough, S.E., Y. Ben-Zion, and P.C. Leary (1994). Tectonic Structure of the Southern end of the 4/22/93 Joshua Tree earthquake rupture zone from analysis of fault zone waves, Bulletin of the Seismological Society of America 84, 761-767. (Citations: 14)

37. Hough, S.E., (1994). Southern surface rupture associated with the M7.3 Landers, California, earthquake, Bulletin of the Seismological Society of America, 84, 817-825. (Citations: 3)

38. Hough, S.E. (1995). Earthquakes in the Los Angeles Metropolitan Region: A fractal distribution of rupture sizes? Science. 267, 211-213 (BWTR 12/94). (Citations: 5)

39. Jones, L.E. and S.E. Hough (1995). Analysis of broadband recordings of the 6/28/92 Big Bear Earthquake: Evidence for a multiple-event source, Bulletin of the Seismological Society of America 85, 688-704. (Citations: 5)

40. Hough, S.E., C. Dietel, G. Glassmoyer, and E. Sembera (1995). On the variability of aftershock ground motion in the San Fernando Valley, Geophysical Research Letters 22, 727-730. (Citations: 4).

41. Field, E.H., A.C. Clement, K.H. Jacob, V. Ahronian, S.E. Hough, P.A. Friberg, T.O. Babaian, S.S. Karapetian, S.M. Hovanessian, and H.A Abramian (1995). Earthquake site response in Giumri (formerly Leninakan) Armenia using ambient noise observations, Bulletin of the Seismological Society of America 85, 349-353. (Citations: 19)

42. Hough, S.E. and D.S. Dreger (1995). Source Parameters of the 4/23/92 M6.1 Joshua Tree earthquake and its aftershocks: Empirical Green's function analysis of GEOS and TERRAscope data, Bulletin of the Seismological Society of America 85, 1576-1590. (BWTR 1/95). (Citations: 15)

43. Fischer, K.M., L. Salvati, S.E. Hough, E. Gonzalez, C.E. Nelson, and E.G. Roth (1995) Sediment-induced amplification in the northeastern United States: A case study in Providence, RI, Bulletin of the Seismological Society of America 85, 1388-1397. (Citations: 1)

44. Hough, S.E. (1995). Observational constraints on earthquake source scaling: Understanding the limits in resolution, Tectonophysics 261, 83-96. (Citations: 8)

45. Hough, S.E. (1995). Prospects for increased seismicity in the Los Angeles Basin, IRIS Review of Accomplishments (1984-1994) , J. Park ed. (invited contribution).

46. Hauksson, E., K. Hutton, H. Kanamori, L. Jones, J. Mori, S. Hough, G. Roquemore (1995). Preliminary report on the 1995 Ridgecrest earthquake sequence in eastern California, Seismological Research Letters 66, 54-60.

47. Hough, S.E. and E.H. Field (1996). On the coherence of ground motions across the San Fernando Valley, California, Bulletin of the Seismological Society of America 86, 1724-1732. (Citations: 3)

48. Hough, S.E. (1996). The case against huge earthquakes, Seismological Research Letters 67, 3-4.

49. Field, E.H. and S.E. Hough (1997). The variability of PSV Response spectra across the San Fernando Valley dense array deployed during the Northridge aftershock sequence, Earthquake Spectra, 13, 243-258.

50. Hough, S.E. (1997). Empirical Green's function analysis: taking the next step, Journal of Geophysical Research 102, 5369-5384. (Citations: 7)

51. Hough, S.E. and L.M. Jones (1997), Aftershocks: Are They Earthquakes or Afterthoughts?, Eos, Trans. Am. Geophys. U. 78, 505-508. (Citations: 8)

52. Hough, S.E. and R.S. Dollar (1998), The STORMS deployment, invited contribution, IRIS newsletter.

53. Hough, S.E., J. Lees, and F. Monastero (1999), Attenuation and source properties at the Coso geothermal region, California, Bull. Seism. Soc. Am. 89, 1606-1619. (Citations: 3)

54. Hough, S.E., J.G. Armbruster, L. Seeber, and J.F. Hough (1999), On the Modified Mercalli Intensitise of the 1811-1812 New Madrid, Central United States, earthquakes, U.S. Geol. Surv. Open File Rep. 99-565. (BWTR, 12/99).

55. Scientists from the U.S. Geological Survey, Southern California Earthquake Center, and California divisions of Mines and Geology (2000), A Preliminary Report on the 10/16/1999 M7.1 Hector Mine, California Earthquake, Seismological Research Letters, 72, 328-335, 2000. (BWTR, 11/99). [A collective effort involving over 20 contributors, submitted to the journal within 18 days of the earthquake, on which I served as editor/chief compiler].

56. Hough, S.E., R. Dollar, and P. Johnson (2000), The 1998 earthquake sequence south of Long Valley Caldera, California: Hints of magmatic involvement, Bulletin of the Seismological Society of America, 752-763, 90. (BWTR 7/99) (Citations: 2)

57. Hough, S.E., J.G. Armbruster, L. Seeber, and J.F. Hough (2000), On the Modified Mercalli Intensities and Magnitudes of the 1811-1812 New Madrid, Central United States, earthquakes, Journal of Geophysical Research, 105, 23839-23864. (BWTR 6/99). (Citations: 1).

58. Hough, S.E. (2000). On the scientific value of "unscientific" data, Seismological Research Letters, 71, 483-485. (BWTR 6/00)

59. Hough, S.E. (2000). A volcano in North Carolina: More than just a tall tale? Seismological Research Letters, 71, 693-699, 2000. (BWTR 5/00)

60. Hough, S.E., (2001). Empirical Green's function analysis of recent moderate events in California, Bulletin of the Seismological Society of America, 91, 456-467. (BWTR 6/00)

61. Hough, S.E. (2001). Triggered earthquakes and the 1811-1812 New Madrid, central U.S., earthquake sequence, Bulletin of the Seismological Society of America, 91, 1574-1581, 2001. (BWTR 6/00)

62. Hough, S.E. (2001). The aftershocks that weren't, Natural History Magazine, March, 64-69, 2001 (BWTR 7/00)

63. Bendick, R., R. Bilham, E. Fielding, V. Gaur, S.E. Hough, G. Kier, M. Kulkarni, S. Martin, and M. Mukol (2001). The January 26, 2001 Bhuj, India earthquake, Seismological Research Letters, 72, 328-335. (BWTR 2/01). (Proposed the idea, helped coordinate multi-institutional effort, and contributed results on shaking effects, which represented at least 50% of results in paper.)

64. Hough, S.E. (2001). 2000-2001 Earthquake Seismology Highlights, Geotimes, 46, 14-15. (Invited contribution) (BWTR 5/01).

65. Hough, S.E. and Hiroo Kanamori (2002). Source properties of earthquakes near the Salton Sea triggered by the 10/16/1999 M7.1 Hector Mine earthquake, accepted, Bulletin of the Seismological Society of America. (BWTR 10/00).

66. Hough, S.E. and S. Martin (2002). Magnitude estimates of two large aftershocks of the 16 December, 1811 New Madrid earthquake, submitted, Bulletin of the Seismological Society of America. (BWTR 9/01)

67. Hough, S.E., S. Martin, R. Bilham, and G. Atkinson (2002). The 26 January, 2001 Bhuj, India Earthquake: Observed and Predicted Ground Motions, accepted, Bulletin of the Seismological Society of America. (BWTR 10/01)

68. Stewart, J.P., S.E. Hough (Coordinators); S. V. Vandhana, S. Martin, J.D. Frost, R. Moss, and E. Rathje (Contributors) (2002). Chapter X: Damage Patterns, accepted, EERI Report on 26 January, 2001, Bhuj, India earthquake.

69. Hough, S.E., L. Seeber, and J.G. Armbruster (2002). Intraplate triggered earthquakes: observations and interpretation, submitted, Bulletin of the Seismological Society of America (BWTR 1/02)

70. Hough, S.E. (2002). Earthquake Seismology Highlights, 2001, Geotimes, 2002 (Invited contribution) (BWTR 2/02)

71. Singh, S.K., B.K. Bansal, S.N. Battacharya, J. Pacheco, R. Dattatrayam, M. Ordaz, G. Suresh, Kamal, and S.E. Hough Estimation of ground motion from Bhuj (26 January, 2001; Mw=7.6) and from future earthquakes of India, submitted Bulletin of the Seismological Society of America (BWTR 2/02) (very minor technical contributions, modest contribution to improve presentation).

72. Hough, S.E. (2002) Remotely Triggered Earthquakes: A Decade After Landers, Where do we Stand?,


19. PUBLICATIONS (Include copies of your 3 most significant career publications or research products. Explain in a few sentences the significance of each publication.)

1. Hough, S.E., J.G. Armbruster, L. Seeber, and J.F. Hough (2000). On the Modified Mercalli Intensities and Magnitudes of the 1811-1812 New Madrid, Central United States Earthquakes, Journal of Geophysical Research, . This study, the inception of which was largely serendipitous, may well represent the single most important scientific contribution of my career. By going back to original accounts of the 1811-1812 New Madrid sequence, I believe my co-authors and I have reconciled the long-standing debate regarding the magnitudes of the three principle mainshocks. The resolution is derived from the realizations that 1) many of the original intensity assignments were too high, 2) previous isoseismal contours had been based on only a small subset of the available data, and 3) the data had not been analyzed previously with an appreciation of site response. Our preferred monent-magnitude estimates for the three principal events--7.2-7.3, 7.0, and 7.4-7.5--are more consistent with other lines of indirect evidence constraining magnitude than were the previous magnitude estimates based on intensity data. This study led a series of investigations that are helping to highlight the value of historic earthquake accounts.

2. Hough, S.E. (1997). Empirical Green's function analysis: Taking the next step, J. Geophys. Res. , 102, 5369-5384. In a sense, this paper represents a culmination of research goals dating back to my PhD thesis concerning the independent resolution of source, path, and site response from recordings of small-to-moderate earthquakes. The goal has been an elusive one within the community because of severe trade-offs between the parameters, but the "MEGF method" presented in this paper provides a single-station method that offers significant advantages compared to other methods. The critical contribution of this method is the determination of attenuation from a suite of earthquake recordings from co-located events after the Empirical Green's function method has been applied to determine source properties. Applied first to a limited data set from a portable deployment during the 1995 Ridgecrest, California, sequence, the method yielded promising results. I have since applied the method to a much larger set of earthquakes from the Coso Geothermal region, California, and obtained equally encouraging results (see section 12).

3. Hough, S.E. and H.K. Kanamori (2002). Source properties of earthquakes near the Salton Sea triggered by the 10/16/1999 M7.1 Hector Mine earthquake, Bulletin of the Seismological Society of America. This paper is important for two reasons. First, it presents evidence that a substantial (M>4.5) earthquake near the Salton Sea was triggered by the surface waves from the Hector Mine mainshock. Prior to this study, the earliest recognized triggered event was a smaller event that happened about an hour after the mainshock. The existence of the earlier event has important implications for the triggering mechanism. Also, this study is the first (to my knowledge) to investigate the detailed source properties of remotely triggered earthquakes. The results suggest that the mechanisms and rupture properties of triggered earthquakes are similar to those of "garden variety" tectonic earthquakes. This also has important implications for understanding the physical processes associated with triggering, and suggests that crustal fluids do not necessarily play a direct role in triggering.

20. POSITION DESCRIPTION (Attach current position description.)

approved 1/15/99

INTRODUCTION: This position is located in the Seismology Section of the Western Earthquake Hazards Team, Pasadena, CA. Research within the Section is directed toward earthquake seismology, and gaining an understanding of the strong ground motions produced by earthquakes, so that structures can be engineered to withstand shaking caused by future earthquakes. This position offers formidable challenge in terms of the diverse set of seismic data that are available, the complex geological conditions, and our incomplete understanding of seismic source processes.

1. RESEARCH ASSIGNMENT: As a member of the Southern California megaproject, the incumbent is responsible for the selection of the most fruitful areas of research that will further our understanding of strong ground motions in this region. Incumbent applies broad experience in seismology to investigate ground motions from earthquakes throughout the region, with the goal of improving our understanding of propagation and source processes which control the characteristics (e.g., amplitude, frequency, duration) of strong ground motion. Based on very general guidance from the Chief Scientist and Section Leader, the incumbent coordinates research and operational activities within the Southern California Regional Center, and facilitates cooperation with the California Institute of Technology, as well as with colleagues based at the USGS-Menlo Park, CA.

2. SUPERVISION RECEIVED: Incumbent has substantial freedom in choosing research topics. Investigations include the interpretation of seismic data that are recorded in a braod range of geologic settings and on a variety of instrumentation. Incumbent develops and applies new and innovative techniques of data analysis. Work is performed under very general supervision of the Chief Scientist and Section Leader, with substantial latitude for independent judgement and action. Incumbent selects and evaluates most fruitful research areas and methods to be applied, and takes responsibility for formulating research plans. Scientific conclusions and interpretations are considered technically complete and are only subject to normal peer and Section Leader reviews for accomplishment and adherence to program objectives.

3. GUIDELINES AND ORIGINALITY: In accomplishing assignments, the incumbent will demonstrate scientific and technical innovation, and a mastery of seismic wave propagation and seismic ground motion studies. This knowledge will be focused at understanding of strong ground motions for earthquakes that directly impact Southern California. While there is a body of scientific literature to be consulted, considerable ingenuity is required to evaluate the different wave propagation and source effects that cause variations in strong ground motions. It will be necessary to considerably modify, or reject, existing techniques and to develop new approaches to solve challenging scientific problems. Incumbent also plans and carries out field studies using portable digital seismic instruments to record aftershocks of signficant regional earthquakes, and, as appropriate, designs experiments to address important, unresolved issues related to ground motion prediction.

4. QUALIFICATIONS AND SCIENTIFIC CONTRIBUTIONS: Incumbent will: (1) have authored publications that are considerable interest to other experts in this field of study; (2) have authored reports that are frequently cited by others, and will have been invited to present new and significant results at professional meetings; (3) have developed ideas or methods that have been adopted by other experts in their work; (4) have been sought out for consultation, editing, and reviewing in the field of strong ground motion by other professionally mature colleagues; (5) have been invited to participate in cooperative efforts by Federal, State, and academic institutions to produce new seismic hazard maps for Southern California, and in particular, be able to contrast results and address any discrepancies; (6) have familiarity with VMS and UNIX operating systems, and portable, digital (e.g., GEOS and REFTEK) seismic instrumentation; (7) have a thorough knowledge of observational and theoretical seismology, and in particular, mastery of strong ground motion seismology, and (8) have mastery of the analysis of digital seismic data for retrieval of source and propagation characteristics.