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@andreas.wr.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 3.1, 8 miles WSW of Toms Place, CA at 02:32 PM UTC Saturday, 10 28, 2000 (07:32 AM PDT Saturday, Oct 28, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.3, 3 miles NNW of San Leandro, CA at 05:47 AM UTC Friday, 10 27, 2000 (10:47 PM PDT Thursday, Oct 26, 2000).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.1, 8 miles WSW of Toms Place, CA at 02:32 PM UTC Saturday, 10 28, 2000 (07:32 AM PDT Saturday, Oct 28, 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 OCT 26 0600 0.56 38 48.27 122 44.04 3.15 39 .06 .1 .3 GEY 2.5D 56 4 NN 2000 OCT 27 0547 56.59 37 45.62 122 10.06 6.01 65 .08 .1 .2 HAY 2.3D 48 6 NN 2000 OCT 27 0922 27.23 38 47.93 122 49.06 1.72 21 .02 .2 .3 GEY 2.6D 49 2 NN 2000 OCT 28 0943 40.27 36 5.82 120 12.63 16.50 24 .03 .4 1.1 COA 2.1D 80 10 NN 2000 OCT 28 1013 22.67 36 6.15 120 13.45 13.61 24 .05 .3 .7 COA 2.4D 77 11 NN 2000 OCT 28 1106 19.30 36 6.27 120 12.52 15.89 29 .05 .3 .7 COA 2.2D 84 10 NN 2000 OCT 28 1432 51.63 37 31.31 118 49.35 5.11 36 .07 .3 .6 MOR 3.1D 131 5 NN 2000 OCT 29 0612 22.95 37 28.74 118 31.48 10.02 34 .05 .2 .8 CHA 2.7D 80 10 NN 2000 OCT 30 1649 10.37 40 25.53 124 13.19 20.65 16 .04 .3 .3 MEN 2.3D 99 8 NN 2000 OCT 30 2033 56.72 37 40.17 122 29.63 11.80 49 .05 .2 .4 SFP 2.1D 90 4 NN 2000 OCT 31 0951 40.55 38 46.85 122 44.65 5.80 37 .08 .2 .3 GEY 2.3D 36 2 NN 2000 OCT 31 1817 14.83 36 39.02 121 16.18 6.10 46 .05 .1 .3 STN 2.7D 61 2 WW 2000 NOV 1 0605 49.51 38 45.56 122 44.63 1.99 20 .06 .2 .5 GEY 2.3D 44 3 WW 2000 NOV 1 0752 51.42 37 31.04 118 49.50 4.65 34 .04 .2 .5 MOR 2.4D 113 5 WW 2000 NOV 1 2222 15.54 36 38.10 121 15.19 10.65 47 .06 .2 .4 STN 2.2D 64 4 WW
