(Ml 4.1) CALTECH/USGS EARTHQUAKE MESSAGE

[quake-large-owner@eqinfo.wr.usgs.gov]

                     == PRELIMINARY EARTHQUAKE REPORT ==

                    California Integrated Seismic Network
                           http://www.cisn.org
                      USGS/Caltech/CGS/UCB/UCSD/UNR

Version 1: This report supersedes any earlier reports about this event.

This is a computer-generated message and has not yet been reviewed by a
seismologist.

PRINCIPAL EARTHQUAKE PARAMETERS
_______________________________


Magnitude              : 4.1  Ml (A light quake)
Event Date & Time      :  4/20/2005   11:36:18 PM PDT
                          4/21/2005   06:36:18    UTC
Coordinates            : 33.6932 N, 120.0217 W
                       : (33 deg. 41.59 min. N,  120 deg.  1.30 min. W)
Depth                  :    0.0 miles (   0.0 km)
Location Quality       : Good
 18 mi. ( 29 km) SSE of Santa Rosa Is., CA
 54 mi. ( 86 km) SSW of Santa Barbara, CA
 53 mi. ( 85 km) S   of SYP (quarry)

More Information about this event and other earthquakes is available at
http://quake.wr.usgs.gov/recenteqs/latestfault.htm

ADDITIONAL EARTHQUAKE PARAMETERS
________________________________
rms misfit                   :  0.22 seconds
horizontal location error    :   1.0 km
vertical location error      :   2.2 km
maximum azimuthal gap        :   200 degrees
distance to nearest station  :  49.0 km
event ID                     : 14139108

SOURCE OF INFORMATION/CONTACTS
________________________________

CISN Southern California Management Center

         Caltech Seismological Laboratory
         U.S. Geological Survey

         http://www.cisn.org/scmc.html

________________________________

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