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 3.5, 7 miles W of Lake Pillsbury, CA at 05:49 PM UTC Saturday, 11 04, 2000 (09:49 AM PST Saturday, Nov 04, 2000).
The region where this earthquake occurred has had many quakes since June 2000. The largest was a magnitude 3.8 quake that occurred on August 20, in nearly the same location. This most recent quake was reported felt by at least 23 people, mostly to the west in the Ukiah-Willits-Lake Pillsbury region.
The largest event to occur this week in this region was a microearthquake of magnitude 3.0, 5 miles ENE of Vallejo, CA at 11:59 AM UTC Wednesday, 11 08, 2000 (03:59 AM PST Wednesday, Nov 08, 2000).
This earthquake was felt throughout the region by many people. The last one to occur in this area was a M3.6 event on July 15 under Concord. It was preceded by a M3.2 event, also in Concord, on April 1, 2000. Prior to these events this region has not experienced quakes of this size since early 1997.
The largest event to occur this week in this region was a microearthquake of magnitude 2.3, 11 miles SW of Toms Place, CA at 12:54 AM UTC Wednesday, 11 08, 2000 (04:54 PM PST Tuesday, Nov 07, 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 NOV 2 0445 19.91 40 28.26 124 12.57 28.53 19 .07 .4 .7 EUR 2.6D 98 10 NN 2000 NOV 2 1112 58.36 36 26.46 120 23.56 10.26 53 .11 .2 .4 COA 2.2D 104 22 NN 2000 NOV 2 2217 38.70 38 58.83 123 23.93 6.07 28 .07 .2 .8 PAR 2.2D 88 14 NN 2000 NOV 3 0844 27.52 39 20.16 122 50.83 6.96 22 .08 .3 1.1 BAR 2.2D 80 19 WW 2000 NOV 4 1232 47.20 38 46.61 122 45.62 2.25 39 .06 .1 .3 GEY 2.2D 31 4 NN 2000 NOV 4 1749 13.82 39 24.37 123 4.91 8.75 48 .15 .2 .9 BAR 3.5D 52 16 NN 2000 NOV 4 2313 44.84 39 24.90 123 5.38 4.87 37 .07 .1 .8 BAR 2.2D 49 16 NN 2000 NOV 4 2346 46.26 39 28.18 121 58.81 14.28 31 .06 .5 1.8 SAC 1.4D 76 25 NN 2000 NOV 4 2346 47.20 39 24.64 123 5.11 5.97 33 .09 .2 .9 BAR 2.8D 50 16 NN 2000 NOV 5 0022 9.15 37 23.80 118 54.58 5.00 8 .03 .8 6.2 SIL - 2.9D 167 19 NN 2000 NOV 5 0432 32.11 37 51.78 121 47.78 16.64 53 .08 .2 .3 GRN 2.3D 67 11 NN 2000 NOV 5 1544 46.41 38 44.80 122 42.87 2.42 33 .06 .1 .2 NAP 2.6D 54 3 NN 2000 NOV 5 2135 41.84 38 48.81 122 48.68 3.96 27 .04 .2 .4 GEY 2.2D 40 2 WW 2000 NOV 5 2357 2.41 36 28.17 121 2.78 6.03 46 .05 .1 .3 BIT 2.1D 57 5 NN 2000 NOV 6 0249 27.06 38 55.40 122 41.97 2.32 23 .09 .2 .5 KON 2.0D 65 3 NN 2000 NOV 6 1235 52.55 37 53.82 121 33.45 15.21 82 .17 .2 .3 JQN 2.3D 48 11 NN 2000 NOV 7 1222 27.55 37 33.84 118 29.44 11.98 25 .07 .3 .5 CHV 2.2D 46 5 NN 2000 NOV 8 0054 29.87 37 28.00 118 50.42 7.00 28 .06 .3 1.7 MOR 2.3D 132 9 WW 2000 NOV 8 1151 27.94 37 33.37 118 47.37 7.91 35 .06 .2 .5 MOR 2.3D 91 3 WW 2000 NOV 8 1159 41.72 38 7.60 122 9.93 9.28 75 .24 .2 .4 NAP 3.0D 77 1 WW 2000 NOV 8 1905 12.97 38 50.26 122 47.31 2.59 46 .09 .1 .5 GEY 3.4L 32 3 WW 2000 NOV 8 1906 46.63 38 48.87 122 49.19 2.13 9 .06 .6 2.2 GEY 2.3D 139 6 WW 2000 NOV 8 2044 29.89 36 27.12 121 0.86 2.79 24 .08 .3 1.0 BIT 2.3D 62 9 WW
