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 light earthquake of magnitude 4.1, 18 miles WNW of Punta Gorda, CA at 09:12 AM UTC Monday, 05 08, 2000 (02:12 AM PDT Monday, May 08, 2000).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.4, 4 miles ENE of Watsonville, CA at 08:00 AM UTC Tuesday, 05 09, 2000 (01:00 AM PDT Tuesday, May 09, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 6 miles S of Toms Place, CA at 03:38 AM UTC Monday, 05 08, 2000 (08:38 PM PDT Sunday, May 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 MAY 4 0928 8.96 40 40.21 122 25.02 24.21 8 .07 .8 .8 SHA 2.5D 146 9 NN 2000 MAY 4 1826 16.07 35 23.44 120 56.37 0.32 25 .04 .3 3.1 SSM 2.1D 162 15 NN 2000 MAY 5 0232 0.20 40 21.90 124 4.07 29.65 18 .06 .4 .8 MEN 2.2D 94 7 NN 2000 MAY 6 1051 28.20 36 43.02 121 4.39 1.43 58 .33 .3 1.2 ORT # 2.3D 58 7 NN 2000 MAY 7 1505 19.64 36 51.93 121 35.67 6.05 58 .08 .1 .2 SJB 2.1D 49 2 NN 2000 MAY 7 1550 32.49 36 14.80 120 49.19 6.43 57 .13 .2 .3 BIT 2.7D 87 4 NN 2000 MAY 7 1650 40.59 36 14.67 120 49.71 6.04 60 .16 .2 .4 BIT # 3.1D 92 4 NN 2000 MAY 8 0338 27.51 37 28.51 118 40.61 10.78 12 .04 .3 1.0 WCS 2.2D 114 4 NN 2000 MAY 8 0912 34.92 40 19.31 124 41.70 7.39 65 .12 .5 .5 MEN 4.1L 235 35 NN 2000 MAY 8 1105 8.19 37 22.88 118 48.11 11.41 36 .07 .3 .9 KAI 2.4D 93 14 NN 2000 MAY 9 0800 55.98 36 56.15 121 40.95 11.96 70 .08 .2 .3 SJB 3.4D 56 2 NN 2000 MAY 9 0806 2.22 36 56.16 121 40.97 11.90 69 .08 .2 .3 SJB 2.9D 56 2 NN 2000 MAY 10 1124 13.95 36 51.53 121 35.56 7.26 60 .09 .2 .3 SJB 2.7D 46 3 WW 2000 MAY 10 1219 47.80 36 51.57 121 35.59 7.33 58 .08 .2 .3 SJB 2.5D 46 3 WW 2000 MAY 10 1720 31.10 36 57.59 121 34.60 5.74 65 .14 .2 .4 SAR 2.5D 32 1 WW 2000 MAY 10 2302 23.54 36 27.68 120 10.94 18.35 47 .18 .4 .3 JQN 2.6D 139 4 WW
