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@andreas.wr.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 3.3, 2 miles N of Pinnacles, CA at 07:40 PM UTC Thursday, 09 28, 2000 (12:40 PM PDT Thursday, Sep 28, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.5, 9 miles E of San Jose City Hall, CA at 08:44 AM UTC Thursday, 09 28, 2000 (01:44 AM PDT Thursday, Sep 28, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.9, 8 miles ESE of Mammoth Lakes, CA at 12:56 AM UTC Saturday, 09 30, 2000 (05:56 PM PDT Friday, Sep 29, 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 SEP 28 0844 6.49 37 21.56 121 43.57 6.96 69 .06 .1 .2 ALU 2.5D 35 3 NN 2000 SEP 28 1001 42.61 38 46.18 122 43.72 3.41 42 .07 .1 .3 GEY 2.6D 35 1 NN 2000 SEP 28 1627 31.60 35 54.89 120 47.87 2.63 43 .05 .2 .7 ROB 2.1D 55 15 NN 2000 SEP 28 1940 18.85 36 33.58 121 9.01 7.48 59 .06 .1 .3 PIN 3.3D 32 4 WW 2000 SEP 28 2017 43.20 36 33.50 121 9.03 6.60 33 .05 .2 .5 PIN 2.3D 32 4 WW 2000 SEP 28 2033 33.79 35 54.57 120 47.91 4.52 30 .05 .2 .6 ROB 2.2D 54 15 WW 2000 SEP 28 2117 38.56 36 33.57 121 9.13 6.73 33 .05 .2 .4 PIN 2.3D 33 4 WW 2000 SEP 29 1106 38.66 38 49.45 122 50.34 2.12 37 .06 .1 .4 GEY 2.9D 31 4 NN 2000 SEP 29 1533 7.38 38 47.60 122 46.72 5.23 25 .05 .2 .4 GEY 2.2D 39 2 WW 2000 SEP 29 1710 52.98 36 22.61 121 2.23 0.02 9 .15 .7 .4 BIT # 2.2D 99 6 NN 2000 SEP 30 0056 36.33 37 35.43 118 50.19 10.61 34 .06 .2 .4 MOR 2.9D 93 1 NN 2000 SEP 30 0544 46.06 36 33.10 121 8.44 2.64 47 .06 .1 .3 PIN 2.2D 57 5 NN 2000 SEP 30 0734 9.93 36 33.53 121 8.91 7.09 50 .05 .1 .3 PIN 2.5D 49 4 NN 2000 OCT 1 1846 8.59 38 47.23 122 46.53 1.13 24 .06 .2 .4 GEY 2.1D 76 3 NN 2000 OCT 2 1229 54.41 36 33.86 121 9.28 2.72 25 .07 .2 .5 PIN 2.2D 50 3 WW 2000 OCT 2 2106 29.07 36 33.53 121 9.07 6.83 33 .05 .2 .5 PIN 2.3D 59 4 WW 2000 OCT 3 2345 17.63 38 25.85 122 38.33 9.20 36 .07 .1 .4 ROG 2.1D 46 5 WW 2000 OCT 4 0106 8.49 36 33.34 121 3.50 8.84 33 .07 .2 .4 BVL 2.2D 48 3 WW 2000 OCT 4 1242 5.20 37 32.08 118 48.94 6.71 30 .06 .3 .6 MOR 2.3D 109 4 WW
