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 3.1, 11 miles ENE of Milpitas, CA at 01:05 PM UTC Monday, 04 10, 2000 (06:05 AM PDT Monday, Apr 10, 2000).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.1, 11 miles ENE of Milpitas, CA at 01:05 PM UTC Monday, 04 10, 2000 (06:05 AM PDT Monday, Apr 10, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.5, 8 miles WSW of Toms Place, CA at 10:43 PM UTC Thursday, 04 06, 2000 (03:43 PM PDT Thursday, Apr 06, 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 APR 6 1535 22.56 36 34.75 121 10.40 2.31 49 .06 .1 .2 PIN 2.8D 27 2 NN 2000 APR 6 1903 6.54 38 20.95 122 11.88 8.04 56 .16 .2 .4 GVL 2.6D 63 8 NN 2000 APR 6 2243 58.59 37 31.81 118 49.01 5.62 37 .05 .2 .4 MOR 2.5D 110 4 NN 2000 APR 6 2344 9.96 40 45.27 123 54.59 25.56 16 .04 .4 .5 EUR 2.3D 114 5 NN 2000 APR 7 1146 42.55 37 32.60 118 52.76 8.04 33 .06 .3 .5 MOR 2.0D 106 7 NN 2000 APR 7 2110 8.26 37 31.28 118 49.63 7.09 35 .04 .2 .5 MOR 2.3D 112 5 NN 2000 APR 8 0036 15.80 38 49.12 122 47.65 4.89 27 .05 .2 .3 GEY 2.2D 54 1 NN 2000 APR 8 0651 42.23 35 48.04 120 20.81 7.03 44 .05 .1 .2 GOL 2.8D 56 3 NN 2000 APR 9 1201 18.26 40 16.10 121 11.30 3.72 46 .17 .3 1.6 ALM 3.0D 114 25 NN 2000 APR 9 1315 10.78 40 17.43 121 13.67 7.82 16 .03 .4 1.0 ALM 2.4D 206 20 NN 2000 APR 9 1340 45.87 40 16.77 121 11.36 7.09 33 .16 .4 1.2 ALM 2.6D 115 24 NN 2000 APR 9 1650 59.50 39 24.77 121 29.18 3.68 19 .08 .3 .8 ORO 2.2D 92 4 NN 2000 APR 9 2125 22.16 38 5.28 122 24.20 13.31 57 .13 .2 .4 ROG 2.4D 43 11 NN 2000 APR 10 0707 43.62 38 48.33 122 47.57 1.07 20 .08 .2 .5 GEY 2.1D 37 0 NN 2000 APR 10 1305 29.64 37 28.48 121 42.90 9.70 83 .05 .1 .3 HAM 3.1D 65 6 NN 2000 APR 10 1313 56.16 37 28.55 121 42.90 9.34 76 .04 .1 .3 HAM 2.5D 66 5 NN 2000 APR 11 0747 45.67 36 33.70 120 36.10 15.70101 .20 .2 .5 CRV 2.8D 34 20 NN 2000 APR 11 1412 16.03 37 50.52 122 0.78 14.19 52 .08 .2 .3 CON 2.6D 67 3 WW 2000 APR 11 1919 58.45 36 22.87 121 1.84 0.04 15 .15 .6 1.0 BIT # 2.1D 94 11 WW 2000 APR 12 1057 47.92 40 27.19 124 25.25 25.71 21 .06 .8 .5 MEN 2.8D 232 8 WW
