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 3.7, 7 miles NW of Punta Gorda, CA at 02:25 AM UTC Saturday, 07 08, 2000 (07:25 PM PDT Friday, Jul 07, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 5 miles NE of Napa, CA at 06:20 AM UTC Sunday, 07 09, 2000 (11:20 PM PDT Saturday, Jul 08, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.5, 11 miles WSW of Toms Place, CA at 07:02 AM UTC Monday, 07 10, 2000 (12:02 AM PDT Monday, Jul 10, 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 JUL 6 1247 1.05 37 27.30 118 49.29 8.23 24 .12 .7 1.1 MOR 2.2D 135 9 WW 2000 JUL 7 0015 14.93 40 18.60 124 31.20 15.20 39 .10 .8 .3 MEN 3.5D 226 24 NN 2000 JUL 8 0225 10.11 40 19.68 124 28.09 24.21 36 .08 .6 .5 MEN 3.7D 224 20 NN 2000 JUL 8 0616 7.70 36 23.68 120 56.86 1.53 37 .08 .2 .5 BIT 2.1D 77 7 NN 2000 JUL 8 1554 49.80 38 49.79 122 47.84 0.04 15 .36 1.1 2.4 GEY # 2.0D 59 2 WW 2000 JUL 9 0620 40.25 38 20.54 122 12.21 5.50 49 .20 .2 .5 GVL 2.4D 63 7 NN 2000 JUL 10 0647 29.32 37 38.28 119 24.01 11.56 24 .09 .3 2.1 KAI 2.3D 99 28 WW 2000 JUL 10 0702 46.70 37 28.67 118 50.53 5.44 35 .06 .3 .7 MOR 2.5D 123 9 NN 2000 JUL 10 0914 14.27 37 29.07 118 50.42 3.72 21 .07 .3 .8 MOR 2.1D 126 8 WW 2000 JUL 10 1225 49.42 36 23.62 120 44.42 14.67 39 .08 .2 .2 CRV 2.1D 132 7 NN 2000 JUL 10 1310 28.87 36 22.88 120 43.42 15.29 29 .08 .3 .4 CRV 2.1D 132 9 NN 2000 JUL 10 2044 11.73 38 48.12 122 46.28 1.86 22 .05 .2 .3 GEY 2.2D 45 2 WW 2000 JUL 11 0002 23.39 36 16.07 120 22.33 9.37 34 .09 .2 .3 COA 2.5D 56 8 WW 2000 JUL 11 0202 38.14 37 15.19 121 38.28 5.28 43 .04 .2 .4 SFL 2.0D 96 3 WW 2000 JUL 11 0631 37.23 39 26.25 122 55.53 7.69 24 .13 .3 .6 BAR 2.3D 80 6 WW 2000 JUL 11 2340 20.69 37 7.67 121 31.79 7.33 67 .05 .1 .3 CYN 2.3D 89 2 WW 2000 JUL 12 1151 20.76 37 38.58 119 3.07 3.45 19 .04 .2 .6 MAM 2.1D 97 2 WW
