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 microearthquake of magnitude 3.0, 12 miles NNW of Independence, CA at 09:43 PM UTC Wednesday, 06 21, 2000 (02:43 PM PDT Wednesday, Jun 21, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.3, 11 miles N of Morgan Hill, CA at 01:32 PM UTC Thursday, 06 15, 2000 (06:32 AM PDT Thursday, Jun 15, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.8, 7 miles S of Toms Place, CA at 10:11 AM UTC Sunday, 06 18, 2000 (03:11 AM PDT Sunday, Jun 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 JUN 15 0305 11.83 39 25.41 123 33.10 1.64 10 .04 .4 .8 PAR 2.1D 159 3 WW 2000 JUN 15 0637 34.41 37 33.94 118 38.85 33.74 11 .11 .8 4.7 CAS # 2.1D 117 24 WW 2000 JUN 15 1216 40.95 39 25.08 123 32.37 3.29 23 .13 .3 .8 PAR 2.8D 129 2 WW 2000 JUN 15 1332 13.93 37 17.32 121 39.95 6.45 45 .05 .2 .4 SFL 2.3D 59 11 WW 2000 JUN 16 1649 31.00 35 29.57 120 47.51 5.16 21 .05 .3 1.4 SSM 2.4D 112 18 WW 2000 JUN 17 0940 56.75 36 34.58 121 10.18 5.76 37 .05 .2 .4 PIN 2.2D 42 2 WW 2000 JUN 17 1201 21.76 35 5.45 120 47.39 10.37 16 .06 .5 .7 SSM 2.5D 176 21 WW 2000 JUN 17 1326 53.26 38 48.43 122 47.78 4.35 21 .07 .2 .5 GEY 2.0D 55 0 WW 2000 JUN 17 1819 19.29 36 49.90 121 33.76 7.30 46 .09 .2 .3 SJB 2.0D 35 2 WW 2000 JUN 18 1011 24.00 37 27.23 118 41.27 16.29 30 .06 .3 .8 WCS 2.8D 124 5 WW 2000 JUN 19 0726 31.05 36 38.80 121 14.18 7.61 40 .05 .2 .4 STN 2.1D 41 6 WW 2000 JUN 21 2143 57.41 36 58.54 118 16.01 8.54 28 .09 .9 1.2 OWV 3.0D 156 22 WW 2000 JUN 21 2157 21.34 36 58.62 118 15.31 9.18 28 .06 .5 .9 OWV 2.9D 163 22 WW
