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 an earthquake of magnitude 4.2, 6 miles W of Lake Pillsbury, CA at 10:32 PM UTC Wednesday, 05 17, 2000 (03:32 PM PDT Wednesday, May 17, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 2 miles WNW of Cupertino, CA at 02:11 PM UTC Sunday, 05 14, 2000 (07:11 AM PDT Sunday, May 14, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.3, 11 miles WSW of Toms Place, CA at 11:30 AM UTC Wednesday, 05 17, 2000 (04:30 AM PDT Wednesday, May 17, 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 11 0510 21.91 37 32.80 118 48.20 10.75 33 .07 .2 .5 MOR 2.2D 106 3 NN 2000 MAY 11 0604 27.56 38 48.20 122 48.07 4.20 41 .04 .1 .2 GEY 2.5D 34 1 NN 2000 MAY 11 0645 40.05 36 12.96 120 47.93 8.22 35 .10 .2 .5 BIT 2.0D 109 14 NN 2000 MAY 11 1010 42.41 38 48.79 122 47.87 3.74 43 .06 .1 .3 GEY 3.1D 37 1 NN 2000 MAY 11 1156 0.24 38 48.64 122 47.93 4.28 37 .04 .1 .2 GEY 2.6D 37 0 NN 2000 MAY 11 2143 25.46 38 54.84 122 38.05 3.61 38 .11 .2 .6 KON 2.7D 87 4 NN 2000 MAY 13 0219 9.76 37 17.69 121 40.63 1.98 31 .06 .2 .5 SFL 2.0D 67 4 WW 2000 MAY 13 0805 43.16 36 3.96 120 9.12 11.76 12 .03 .5 .3 COA 2.0D 127 4 WW 2000 MAY 13 0812 56.62 36 4.20 120 9.11 12.04 16 .03 .3 .4 COA 2.1D 87 4 WW 2000 MAY 13 0951 57.63 39 23.90 123 4.02 5.56 35 .12 .2 1.1 BAR 3.0D 56 16 WW 2000 MAY 13 1714 2.15 39 23.86 123 4.37 2.74 25 .10 .2 2.2 BAR 2.3D 74 16 WW 2000 MAY 14 0023 33.11 37 32.49 118 51.11 8.99 27 .04 .3 .6 MOR 2.1D 109 6 WW 2000 MAY 14 0029 3.49 38 49.06 122 48.51 4.70 26 .04 .2 .4 GEY 2.3D 44 2 WW 2000 MAY 14 0550 46.95 38 49.56 122 47.68 4.45 41 .06 .1 .3 GEY 2.7D 36 2 WW 2000 MAY 14 1411 49.03 37 19.90 122 3.49 0.02 54 .40 .5 1.7 SCV # 2.4D 33 3 WW 2000 MAY 15 0408 26.80 38 47.95 122 43.90 3.42 16 .07 .2 .8 GEY 2.1D 55 3 WW 2000 MAY 15 0926 52.31 40 37.91 122 23.05 26.45 9 .03 .6 1.0 SHA 2.4D 77 12 WW 2000 MAY 15 1543 27.17 36 49.63 119 14.42 19.01 9 .25 6.912.4 KAI 2.4L 210 87 WW 2000 MAY 15 1816 6.57 37 33.39 121 46.71 7.89 32 .06 .3 .4 SUN 2.1D 171 9 WW 2000 MAY 15 1939 36.00 39 23.87 123 4.36 4.50 28 .07 .2 1.1 BAR 2.7D 55 16 WW 2000 MAY 17 1130 42.44 37 28.64 118 50.42 4.93 30 .05 .3 .7 MOR 2.3D 123 8 WW 2000 MAY 17 1947 33.82 36 34.32 121 9.84 2.94 29 .06 .2 .4 PIN 2.2D 45 2 WW 2000 MAY 17 2149 59.64 39 23.84 123 4.23 3.63 20 .09 .2 1.8 BAR 2.3D 56 16 WW 2000 MAY 17 2229 6.64 40 29.89 124 17.13 19.53 13 .04 .5 .3 EUR 2.9D 135 5 WW 2000 MAY 17 2232 7.66 39 23.54 123 3.99 7.01 47 .13 .2 .9 BAR 4.2L 57 16 WW 2000 MAY 17 2346 23.17 39 23.15 123 3.59 3.02 29 .12 .2 1.8 BAR 2.4D 57 16 WW 2000 MAY 17 2351 13.55 39 23.16 123 3.78 4.14 17 .09 .2 2.5 BAR 2.2D 70 17 WW
