This report provides a brief summary of earthquake activity recorded by the U.S. Geological Survey Northern California Seismic Network in Menlo Park and the University of California Berkeley Seismological Laboratory. It is automatically generated each Wednesday shortly after midnight, Universal time (UT). UT (ie., Greenwich Mean Time) is 8 hours ahead of PST or 7 hours ahead of PDT.
Because it is not possible to review all of the earthquakes before this report is generated, it may contain errors. Please report errors or provide suggestions and comments to ncsn@usgs.gov
The report no longer includes maps showing earthquakes for the entire US or world. Those maps are now available from the U.S.G.S. National Earthquake Information Center. In addition, all earthquake data can be retrieved from the Northern California Earthquake Data Center.
Please note that some of the earthquake data in this report have been reviewed by seismic analysts. Consequently, the parameters that describe the hypocenter, magnitude, origin time, and solution statistics may differ slightly from the information contained on the real-time earthquake web page. The differences reflect revised arrival times at seismic stations and the analysts' decisions to include or exclude information from seismic stations.
The minimum magnitude ( M) values in the following bullets reflect the smallest earthquake which the network can routinely record within the region. During the previous seven-day period ending at midnight (UT) Wednesday, our seismic networks recorded
The largest event to occur this week in this region was a minor earthquake of magnitude 3.0, 2 miles ESE of The Geysers, CA at 08:53 PM UTC Monday, 02 28, 2000 (12:53 PM PST Monday, Feb 28, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 2 miles E of Berkeley, CA at 11:10 AM UTC Tuesday, 02 29, 2000 (03:10 AM PST Tuesday, Feb 29, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 6 miles WSW of Toms Place, CA at 08:00 PM UTC Saturday, 02 26, 2000 (12:00 PM PST Saturday, Feb 26, 2000).
The following table provides a listing of all M >2 earthquakes that occurred this week. An explanation of the entries in the table is available.
---ORIGIN TIME (UT)--- -LAT N-- --LON W-- DEPTH N RMS ERH ERZ LOC PREF AZ MIN S. PAGE 1 YEAR MON DA HRMN SEC DEG MIN DEG MIN KM RD SEC KM KM REMKS MAG GAP DS PF 2000 FEB 25 0306 32.30 37 32.79 118 52.37 8.43 33 .04 .3 .4 MOR 2.0D 159 6 NN 2000 FEB 26 2000 31.31 37 32.22 118 46.88 7.50 33 .06 .2 .4 MOR 2.4D 150 1 NN 2000 FEB 27 0931 33.89 36 4.08 120 15.44 10.20 28 .05 .3 .6 COA 2.1D 114 24 NN 2000 FEB 28 1049 21.09 37 23.11 118 32.47 10.60 31 .06 .2 .6 CHA 2.4D 88 4 NN 2000 FEB 28 2053 23.10 38 47.15 122 46.07 3.92 41 .06 .1 .3 GEY 3.0D 37 3 NN 2000 FEB 29 1048 0.58 37 47.88 121 56.57 15.94 50 .05 .2 .3 DAN 2.0D 68 9 NN 2000 FEB 29 1110 9.72 37 52.09 122 14.35 10.52 60 .08 .1 .4 HAY 2.2D 24 2 NN 2000 FEB 29 2058 13.11 36 38.96 121 15.94 5.22 41 .06 .1 .5 STN 2.1D 60 2 WW
