WORLDWIDE 

This large scale national archive for United States and Worldwide earthquake data, NGDC contains a strong motion archive of over 15,000 worldwide digitized and processed records dating from 1933 to 1994 and is available on a 3 CD-ROM collection. Date sources include USGS, CDMG, USC, LDGO, and numerous other agencies. Three types of processed records are included on the CDs: uncorrected (raw), corrected (and filtered), and response spectra.

To determine the availability of records, a database is available online (http://www.ngdc.noaa.gov/seg/hazard/smcat.html) that contains trigger information, station characteristics, and peak ground motion parameters. The software that allows this inventory, called SMCAT, is available for IBM-compatible computers, and can be downloaded from the NOAA web site

Caveats: CDMG data not available after 1987 on the CD-ROMs. Also, the data on the CD-ROMs are not available online at this site.

U.S. Geological Survey (USGS) National Strong Motion Instrumentation Program (NSMP)
345 Middlefield Road, MS 977
Menlo Park, CA 94025
Contact: Chris Stephens
Phone: (650) 329-4752 , Fax: (650) 329-5163
email: cdstephens@usgs.gov
URL: http://nsmp.wr.usgs.gov

The USGS provides uncorrected data from the National Strong-Motion Program for recent (1990-1996) earthquakes online at the NSMP homepage http://nsmp.wr.usgs.gov under "Data Sets". The data are from the USGS, Veteran's Administration, Metropolitan Water District of Southern CA, DOE, Army Corps of Engineers, and selected instrumented local structures. Information about stations, the network and more can be found on the NSMP homepage. The downloaded USGS files have ".zip" suffixes, so on DOS machines use "pkunzip" and with UNIX again use the "unzip" utility. The data available from the USGS web page expands to ASCII "Volume 1" data (uncorrected acceleration).

At this same site, the USGS also provides down-loadable strong-motion (uncorrected "Volume 1") accelerograms of historical earthquakes in North and Central America and Hawaii for the years 1933-1986 from a number of agencies (including CDMG, USGS, CALTECH). The format is compressed ASCII files for either UNIX or DOS platforms. These data are also available on a CD-ROM produced by Linda C. Seekins, Gerald Brady, Catherine Carpenter, and Nicholas Brown. (USGS Digital Data Series DDS-7). Information about the CD-ROM is available at http://nsmp.wr.usgs.gov/data_sets/ncae.html. The cost of the CD-ROM, is $32.00 plus $3.50 for shipping and handling. Order from: USGS Information Services, email: infoservices@usgs.gov, http://mapping.usgs.gov/esic/to_order.html, telephone (303) 202-4200 or 1-800-USA-MAPS. The time series data available on this CD-ROM are also available via the UCSB strong motion database. Their database also searches what is on NSMP and sends ftp requests of this data to the NSMP ftp site.

Software is available online that will correct and process these records and a variety of other formats (CDMG, USC, CIT) http://nsmp.wr.usgs.gov/bap.html. (The BAP software is also available via the anonymous FTP from the "nsmp.wr.usgs.gov" computer on the Internet, in the "/software/bap/4pc/" directory.) Is is also available from the USGS Information Services, Open-File Reports Sales (See Above). Request USGS Open-File Report #92-296A, titled "BAP: Basic Strong-Motion Accelerogram Processing Software; Version 1.0" for the printed user's manual and Open-File Report #92-296B, titled "BAP version 1.1 software distribution diskettes" for two 1.44 MByte PC diskettes. (Note that the user's manual is for version 1.0 and the diskettes are for version 1.1. Differences between the two versions are explained in the "WHATS.NEW" file on the diskettes.) The price for the user's manual is $25.25 for paper copy or $4.00 for microfiche; the price for the diskettes is $20. The diskettes contain executable files for 80386 PCs running DOS as well as FORTRAN source code that can be compiled for other computers. The PC executable files require an IBM- style personal computer with: an 80386 or 80486 CPU, a math coprocessor, hard disk, 3 MBytes of RAM or more, DOS version 3.3 or greater, a postscript printer or postScript-to-other printer translating software, and a text editor. [Thanks to Kent Fogleman, USGS, for the above information.]

California Division of Mines and Geology (CDMG)
Strong Motion Instrumentation Program (CSMIP)
801 K Street, MS - 1335
Sacramento, CA 95814
Contact: Vladimir Graizer
Telephone: (916) 322-3105, Fax: (916) 323-7778
email: smipdata@consrv.ca.gov
URL: http://www.consrv.ca.gov/dmg/csmip/index.htm
FTP SITE: ftp://ftp.consrv.ca.gov/pub/dmg/csmip/

The CSMIP web page is now a direct on-line source for CSMIP strong motion data from most sizable California earthquakes. Data can be chosen by station name (or number) or event name, and the station location, time series, and response spectra can be viewed as selected. Links are provided for obtaining CSMIP reports and obtaining station information.


Downloaded from CDMG, files have ".exe" suffixes which are self extracting with DOS, and can be extracted with the UNIX "unzip" utility, resulting in ASCII formatted Volume 2 (filtered, corrected acceleration, velocity and displacement) and Volume 3 (response spectra) files.

As always, CSMIP can still contacted for processed data in printed form or on tape or diskettes.

Northern California Earthquake Data Center (NCEDC)
University of California Berkeley (UCB)
Seismographic Station
475 McCone Hall #4760
Berkeley, CA 94720-4760
Contact:
Telephone: (510) 642-3977, Fax: (510) 643-5811
email: wwwr@quake.geo.berkeley.edu
URL: http://quake.geo.berkeley.edu/

NCEDC allows access to strong motion data from the Berkeley Digital Seismic Network's (BDSN) 14 broadband stations as well as from strong-motion borehole stations of the Hayward Fault Network (HFN). The Broadband Query and Request Form (BREQ_FAST) programs are used to see what data are available, and to obtain data in SEED format. SEED formatted data can be translated (to SAC, AH) with rdseed, available from Incorporated Research Institutions in Seismology (IRIS) Data Management Center (DMC), but cannot be easily converted to readable ASCII format.

An account is needed to login and and query the database and retrieve waveforms. To request an account, telnet quake.geo.berkeley.edu or see information contained on the downloadable users manual at the above URL.

Strong motion data from CIT/USGS Southern California Seismic Network (SCSN) and TERRAscope stations are archived among other waveform data (short-period and broadband). Acceleration data are available in SAC format and station lists are also available online. An account is needed to login, query the database and retrieve waveforms. To request an account, telnet scec.gps.caltech.edu or see information contained on the down-loadable users manual at the above URL.

Summary of Strong Motion Data of ML=6.4 Northridge, California, Earthquake and Five M>5 Aftershocks Which Occurred Between 17 January and 20 March 1994.

USC strong motion data for a number of earthquakes in the southern California region are available on archives and databases such as SCEC, SMDB, and NGDC. Northridge data are also available directly from USC via the Strong Ground Motion Research Group website in compressed "Volume 1" (raw) files, and ASCII "Volume 2" (filtered, corrected), and ASCII "Volume 3" (spectra) files. The compressed files have ".zip" suffixes; so on DOS machines use "pkunzip" and with UNIX use the "unzip" utility.

The Strong Ground Motion Research Group website also has information on the Los Angeles and Vincity Strong Motion Network, research summaries, and a list of reports from the USC Civil Engineering Department report series.

Los Angeles Department of Water and Power (LADWP)
POWER STATIONS:
Contact: Ron Tognazzini
Telephone: (213) 367-0046

WATER SITES:
Contact: Craig Davis
Telephone: (213) 367-0855
email: cdavis@dwp.ci.la.ca.us

Southern California Edison (SCE)

Pacific Gas and Electric (PGE)


JAPAN 

National Research Institute for Earth Science and Disaster Prevention - Kyoshin Net (KNET), Japan
National Research Institute for Earth Science and Disaster Prevention
3-1, Tennodai
Tsukuba-shi, Ibaraki-ken 305, Japan
Telephone: 0298-54-4940
Fax: 0298-54-4941
email: postmaster@knetgk.k-net.bosai.go.jp
URL: http://www.bosai.go.jp (NIED Home Page)
or for direct access to K-Net: http://www.k-net.bosai.go.jp

The K-NET system provides particularly impressive, rapid access to strong motion data from 1000 new (1995-6) observatories throughout Japan. For example, for a magnitude 6 earthquakes in 1996, records from 175 stations were available on the internet within the day. Data can be in UNIX, DOS, or ASCII format, depending on the user's request. Internet users can also search the K-NET archives of strong-motion records, site information, and maximum acceleration data, and details about the Kyoshin Net.

Caveats: K-NET file names are too long for DOS or Windows 3.1

Japan Railway Company (JR)
Conference on Usage of Earthquakes (CUE)
UrEDAS R&D Promotion Department
Railway Technical Research Institute
2-8-38 Hikari-cho Kokubunji-shi Tokyo 185, Japan
Contact: Jun Saita, Secretary (jun@rtri.or.jp)
Telephone: +81 425 74 1202
Fax: +81 425 74 1205
URL: http://www.rtri.or.jp/rd/UrEDAS/CUEmainE.html

Kansai Electric Power Company (KEPCO)
Office of Civil Engineering and Architecture
3-3-22 Nakanoshima, Kita-ku, Osaka
530-70 Japan
Contact: Mr. Masaki Masumoto, Deputy Director
Telephone: +81 6 441 8821, Fax: +81 6 441 3879

Committee of Earthquake Observation and Research in the Kansai Area (CEORKA)
Geo-Research Institute, Osaka
3-1-23 Nishi-hommachi, Nishi-ku
Osaka, 550, Japan
Contact: Secretariat
Fax: +81 6 536 1739

Port and Harbor Research Institute (PHRI)
Contact: Yuko Hoshino, Secretary
Geotechnical Earthquake Engineering Laboratory
Port and Harbour Research Institute
Ministry of Tranport
3-1-1 Nagase Yokosuka 239, Japan

Building Research Institute (BRI)

Japan Meteorological Agency (JMA)

Kansai Internal Airport Company

Kobe Marine Meteorological Observatory

Ministry of Construction

Osaka Gas Company

MEXICO 

Instituto de Ingenieria (UNAM) and U. Nevada, Reno Seismological Lab - Guerrero Accelerograph Network Seismology Laboratory, UNR
University of Nevada, Reno
Reno, NV 89557
U.S. Contact: John Anderson
Telephone: (702) 784-4265, Fax: (702) 784-1833
email: jga@seismo.unr.edu
URL: http://www.seismo.unr.edu/ftp/zeng/GUERRERO/guerrero.html

A collaborative effort of the Seismological Laboratory, UNR, and the Instituto de Ingeneria, UNAM, the Guerrero Network consists of 30 digital strong motion accelerographs in Guerrero, and neighboring states, Mexico. The Guerrero Strong Motion Network Archive provides acceleration records from 1985 to 1995.

Mexican Strong Motion Database
Contact: Roberto Quaas
Telephone: (52-5) 606-9486, Fax: (52-5) 606-1608
email: rqw@pumas.iingen.unam.mx
URL: http://www.mexacceldb.unam.mx/db/english.html

A CD-ROM is in the making and information should be soon available on the World Wide Web.

ITALY 

Friuli Strong-Motion Network
Dipartimento di Scienze della Terra, University of Trieste
email: costa@geosun0.univ.trieste.it
URL: http://www.dst.univ.trieste.it/raf.html

The Friuli Strong-Motion Network includes 10 broadband (with strong motion sensors) stations. On-line one can access general Network information and station maps, response, and locations. Data available is tabulated, but not accessible thru the internet (A Web page currently under development). Data can be received by emailing costa@geosun0.univ.trieste.it

SWITZERLAND 

The Swiss National Strong motion Network has 75 strong motion instruments including many free-field and Dam sites installed over the last 5 years. On the Web site, there is abundant information about the network and the data recorded to date as well as examples of recorded data.

TURKEY 

SMA Network of Turkey
Earthquake Research Department
Ankara Turkiye
Contact: H. Engin Inan
Phone: 90 312 287 36 45, Fax: 90 312 285 53 04
email: einan@deprem.gov.tr
URL: ftp://angora.deprem.gov.tr

Accelerograms for earthquakes since 1976, recorded on the SMA Network of Turkey, are listed and downloadable individually in binary format. To decode the binary, one must download the DOS software (bin2txt.exe) available at that site. Also by FTP, but at a different URL (ftp.deprem.gov.tr/pub/sma), strong motion records are given in compressed ASCII form. More information is available at the ftp sites.

GREAT BRITAIN