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 3.7, 12 miles E of Cottonwood, CA at 09:16 AM UTC Sunday, 07 30, 2000 (02:16 AM PDT Sunday, Jul 30, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.9, 11 miles N of Morgan Hill, CA at 05:06 PM UTC Wednesday, 08 02, 2000 (10:06 AM PDT Wednesday, Aug 02, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 9 miles WSW of Toms Place, CA at 08:11 PM UTC Friday, 07 28, 2000 (01:11 PM PDT Friday, Jul 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 JUL 27 0022 57.53 39 47.86 122 34.66 10.54 38 .27 .3 .7 SAC 2.9D 37 15 NN 2000 JUL 27 0533 47.75 38 46.34 122 43.91 2.74 32 .08 .2 .4 GEY 2.5D 39 1 NN 2000 JUL 27 0916 14.67 37 30.71 118 49.71 7.09 33 .05 .2 .5 MOR 2.1D 114 5 NN 2000 JUL 27 1511 41.54 36 49.53 121 33.04 5.97 42 .10 .2 .3 SJB 2.1D 36 3 WW 2000 JUL 28 1641 49.98 39 27.64 123 10.83 5.36 36 .06 .1 .8 BAR 2.5D 47 11 NN 2000 JUL 28 2011 26.48 37 31.17 118 49.67 3.90 28 .06 .3 .6 MOR 2.2D 113 5 WW 2000 JUL 29 0945 18.10 39 1.66 123 4.05 3.88 40 .06 .1 .4 MAA 2.7D 29 4 NN 2000 JUL 29 2151 40.19 37 3.05 121 29.09 8.44 52 .07 .2 .3 CYS 2.0D 78 3 WW 2000 JUL 30 0408 41.63 39 1.20 123 4.36 5.95 25 .09 .2 .6 MAA 2.4D 42 5 WW 2000 JUL 30 0916 37.93 40 23.12 122 3.27 19.17 42 .32 .4 .8 SHA 3.7D 32 21 NN 2000 JUL 31 0301 7.83 37 25.11 121 46.01 7.75 64 .03 .1 .3 ALU 2.2D 31 5 NN 2000 AUG 1 0132 59.97 38 49.05 122 48.42 5.00 39 .06 .1 .3 GEY 2.3D 34 2 NN 2000 AUG 1 0813 37.59 37 42.33 121 59.69 9.81 55 .11 .2 .2 DAN 2.1D 50 7 NN 2000 AUG 1 1943 59.29 38 49.16 122 47.72 3.30 33 .11 .2 1.0 GEY 2.9D 68 7 WW 2000 AUG 1 2113 35.11 38 49.03 122 47.54 4.42 19 .04 .2 .4 GEY 2.0D 39 1 WW 2000 AUG 2 0651 52.50 37 38.21 119 23.56 13.56 27 .10 .3 1.5 KAI 2.7D 75 28 WW 2000 AUG 2 1706 20.60 37 17.11 121 39.74 6.49 72 .05 .1 .2 SFL 2.9D 79 3 WW 2000 AUG 2 2022 33.31 38 44.62 122 42.49 3.41 17 .04 .2 .8 NAP 2.2D 57 3 WW
