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 3.8, 7 miles SW of Lake Pillsbury, CA at 04:45 AM UTC Monday, 08 21, 2000 (09:45 PM PDT Sunday, Aug 20, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.5, 2 miles SSE of San Juan Bautista, CA at 03:02 PM UTC Monday, 08 21, 2000 (08:02 AM PDT Monday, Aug 21, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.0, 8 miles WSW of Toms Place, CA at 05:26 AM UTC Saturday, 08 19, 2000 (10:26 PM PDT Friday, Aug 18, 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 AUG 17 0509 30.97 36 37.00 121 9.36 8.60 68 .11 .2 .3 BVL 3.5D 40 6 NN 2000 AUG 17 0912 58.68 40 49.44 121 40.75 22.03 8 .19 .9 3.0 SHA 2.6D 151 40 WW 2000 AUG 17 1341 39.62 36 30.60 120 39.78 7.92112 .17 .2 .6 CRV 3.6D 62 21 NN 2000 AUG 18 0324 6.32 38 49.60 122 49.13 1.68 14 .06 .2 .6 GEY 2.3D 45 3 WW 2000 AUG 18 0456 33.25 36 36.79 121 9.65 7.85 53 .09 .1 .3 BVL 2.7D 59 5 NN 2000 AUG 18 0943 16.01 39 20.95 123 2.08 6.84 31 .06 .1 .9 BAR 2.1D 58 19 NN 2000 AUG 18 1412 17.04 38 47.83 122 47.74 1.92 43 .07 .1 .2 GEY 3.0D 34 1 NN 2000 AUG 18 1541 58.35 36 36.86 121 9.15 7.35 47 .09 .1 .3 BVL 2.2D 63 6 NN 2000 AUG 19 0418 39.34 36 10.58 120 14.20 13.53 34 .06 .2 .3 COA 2.3D 134 13 NN 2000 AUG 19 1310 32.37 36 36.75 121 9.68 7.93 55 .09 .1 .3 BVL 2.7D 58 5 NN 2000 AUG 19 1919 23.09 35 50.79 119 55.42 9.02 28 .19 1.0 .5 COA 2.2D 110 3 NN 2000 AUG 20 0411 42.64 36 48.24 121 31.18 5.43 55 .08 .1 .2 SJB 2.1D 36 2 NN 2000 AUG 20 1024 35.53 40 15.48 121 21.66 10.15 11 .09 .4 1.1 ALM 2.3D 117 16 NN 2000 AUG 20 1714 12.70 38 47.98 122 44.58 2.26 36 .06 .1 .5 GEY 2.8D 51 4 WW 2000 AUG 20 1858 44.80 39 20.36 123 1.84 8.52 43 .14 .2 .9 BAR 3.0D 57 19 NN 2000 AUG 21 0445 13.50 39 19.92 123 1.83 12.80 60 .16 .2 .4 BAR 3.8D 55 20 NN 2000 AUG 21 0448 16.88 39 20.25 123 1.41 5.47 30 .11 .2 1.4 BAR 2.6D 58 19 WW 2000 AUG 21 1502 51.63 36 48.75 121 31.63 5.59 56 .10 .2 .3 SJB 2.5D 37 5 NN 2000 AUG 21 1853 44.06 37 45.05 121 59.77 8.77 68 .12 .2 .2 DAN 2.3D 53 6 NN 2000 AUG 21 2117 7.87 37 44.94 121 59.63 8.33 34 .09 .2 .3 DAN 2.0D 95 6 WW 2000 AUG 22 1008 57.87 40 15.51 121 22.15 10.81 11 .06 .8 1.3 ALM 2.3D 203 16 WW 2000 AUG 22 2354 21.41 38 47.48 122 46.54 1.63 23 .05 .2 .4 GEY 2.2D 38 2 WW 2000 AUG 23 0444 29.62 36 0.33 120 33.39 5.03 23 .03 .3 .3 SLA 2.1D 162 5 WW 2000 AUG 23 1420 27.11 39 19.88 123 1.47 7.92 44 .14 .2 1.0 BAR 2.8L 57 20 WW
