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 3.5, 5 miles ENE of San Martin, CA at 07:23 AM UTC Sunday, 06 25, 2000 (12:23 AM PDT Sunday, Jun 25, 2000).
The largest event to occur this week in this region was an earthquake of magnitude 3.5, 5 miles ENE of San Martin, CA at 07:23 AM UTC Sunday, 06 25, 2000 (12:23 AM PDT Sunday, Jun 25, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.7, 11 miles WSW of Toms Place, CA at 09:42 AM UTC Wednesday, 06 28, 2000 (02:42 AM PDT Wednesday, Jun 28, 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 22 0657 36.98 36 51.36 121 19.43 5.43 56 .09 .2 .5 QUI # 3.0D 42 3 WW 2000 JUN 22 1250 0.42 37 25.38 118 19.47 6.45 25 .06 .6 .9 CHV 2.1D 187 9 WW 2000 JUN 22 1649 44.81 37 28.81 118 50.54 5.08 31 .04 .3 .7 MOR 2.2D 122 8 WW 2000 JUN 23 1929 54.72 39 21.17 123 2.80 0.45 23 .19 .3 6.3 BAR 2.2D 38 19 WW 2000 JUN 24 0054 53.71 37 27.46 118 37.97 14.03 23 .06 .3 .8 RVL 2.2D 108 9 WW 2000 JUN 24 0102 13.41 37 27.43 118 38.01 14.02 24 .06 .3 .8 RVL 2.3D 109 9 WW 2000 JUN 24 0437 11.98 37 35.55 118 49.26 3.30 24 .06 .3 .5 MOR 2.1D 102 1 WW 2000 JUN 24 0818 31.66 37 29.03 118 50.31 7.45 22 .04 .3 .8 MOR 2.0D 126 8 WW 2000 JUN 24 1104 17.37 38 45.99 122 41.42 1.26 43 .14 .2 .5 GEY 3.2D 37 2 WW 2000 JUN 25 0147 57.10 38 48.30 122 48.31 3.31 19 .04 .2 .4 GEY 2.1D 53 1 WW 2000 JUN 25 0357 45.28 38 46.23 122 54.95 6.29 24 .08 .2 .6 GEY 2.1D 42 6 WW 2000 JUN 25 0723 18.26 37 7.48 121 31.61 7.75 76 .07 .2 .3 CYN 3.5D 89 1 WW 2000 JUN 25 1237 21.88 37 29.62 118 21.80 5.93 20 .06 .4 .7 CHV 2.3D 177 9 WW 2000 JUN 26 0250 27.62 36 57.93 121 35.61 7.26 59 .12 .2 .4 SAR 2.1D 27 1 WW 2000 JUN 26 1550 39.27 36 2.34 120 35.06 8.59 34 .04 .2 .3 SLA 2.4D 88 3 WW 2000 JUN 27 1927 59.43 37 28.43 121 52.74 0.02 15 .17 .5 2.8 MIS # 2.0D 68 5 WW 2000 JUN 27 2238 42.60 36 40.49 121 17.73 3.90 42 .05 .2 .4 STN 2.3D 42 2 WW 2000 JUN 28 0107 28.81 38 48.40 122 48.13 3.51 22 .05 .2 .3 GEY 2.1D 53 1 WW 2000 JUN 28 0207 42.26 38 48.30 122 47.84 4.97 44 .07 .2 .3 GEY 3.1L 40 0 WW 2000 JUN 28 0306 19.50 38 47.91 122 48.09 2.39 24 .06 .2 .3 GEY 2.0D 59 1 WW 2000 JUN 28 0336 1.80 38 48.95 122 47.48 4.79 26 .05 .2 .4 GEY 2.3D 54 1 WW 2000 JUN 28 0432 23.23 38 39.39 122 43.97 5.26 29 .12 .2 .7 NAP 2.2D 43 6 WW 2000 JUN 28 0550 0.05 36 18.24 120 51.00 8.66 31 .08 .3 .6 BIT 2.3D 129 7 WW 2000 JUN 28 0942 47.51 37 28.87 118 50.56 5.50 30 .07 .3 .9 MOR 2.7D 122 8 WW 2000 JUN 28 1304 55.53 40 25.29 124 15.03 27.62 8 .05 1.1 1.0 MEN 2.4D 230 11 WW
