Northern California Seismicity Report for the week ending Oct 11, 2001

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

• 19 M >2.0 earthquakes in Northern and Central California (map) (within dashed polygon of figure).

The largest event to occur this week in this region was an earthquake of magnitude 3.1, 1 miles S of Saratoga, CA at 02:17 AM UTC Saturday, 10 06, 2001 (07:17 PM PDT Friday, Oct 05, 2001).

• 17 M >1.2 earthquakes in the San Francisco Bay area (map).

The largest event to occur this week in this region was an earthquake of magnitude 3.1, 1 miles S of Saratoga, CA at 02:17 AM UTC Saturday, 10 06, 2001 (07:17 PM PDT Friday, Oct 05, 2001).

• 14 M >1.2 earthquakes in the Long Valley region (map).

The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 11 miles SW of Toms Place, CA at 07:22 AM UTC Friday, 10 05, 2001 (12:22 AM PDT Friday, Oct 05, 2001).

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

2001 OCT  4 0118 20.83 37 16.14 119 57.47 15.54 19 .32 1.2  .6 KAI    2.5D 127 18 NN
2001 OCT  4 0535 39.92 37 29.72 118 52.27  6.81 31 .06  .3 1.0 MOR    2.2D 123 11 NN
2001 OCT  4 1218 33.45 36 34.39 121  9.90  3.05 55 .06  .1  .2 PIN    2.6D  37  2 NN
2001 OCT  4 1536 57.74 38 49.28 122 47.99  3.88 18 .03  .2  .5 GEY    2.0D  49  2 WW
2001 OCT  4 1743 10.64 38 47.84 122 46.97  0.28 20 .08  .2  .5 GEY    2.0D  41  2 NN
 
2001 OCT  4 1855 20.93 37 26.02 118 51.11  7.58 32 .07  .4 1.2 MOR    2.0D 144 13 NN
2001 OCT  5 0722 48.40 37 28.18 118 50.68  7.92 34 .06  .3  .9 MOR    2.2D 131  9 NN
2001 OCT  6 0217 33.84 37 14.55 122  1.58  9.77 86 .10  .1  .3 BLM    3.1L  50  5 NN
2001 OCT  6 1310 45.55 39 50.38 123 30.61  6.43 17 .05  .2  .4 MAA    2.1D 103  4 WW
2001 OCT  6 2253  2.32 36 59.29 121 39.13  5.72 50 .10  .2  .4 SAR    2.0D  38  6 WW
 
2001 OCT  7 1433 42.30 36 48.25 121 31.59  7.34 48 .09  .2  .3 SJB    2.1D  35  3 WW
2001 OCT  7 2113 32.65 39 47.87 121 38.93 19.99 22 .08  .3  .6 ALM    3.0L 112 12 NN
2001 OCT  7 2155 37.31 39 15.67 123 26.92  6.15 14 .05  .2 1.3 PAR    2.1D  84 14 WW
2001 OCT  8 0141 39.46 36 48.25 121 31.60  7.51 42 .09  .2  .4 SJB    2.0D  35  3 WW
2001 OCT  8 1113 33.24 39  8.61 123 33.88  4.97 14 .10  .4 1.4 PAR    2.2D 147  8 WW
 
2001 OCT  8 2136 17.82 38 50.55 122 47.20  2.16 26 .03  .1  .5 GEY    2.2D  37  4 NN
2001 OCT  9 1931 20.57 37  0.80 121 28.22  8.97 73 .09  .2  .3 CYS    2.7D  54  2 WW
2001 OCT 10 1905 22.27 36 11.37 120 18.25  9.76 29 .08  .2  .3 COA    2.6D 101 12 WW
2001 OCT 10 2010 33.42 36 32.28 121  7.18  2.81 24 .05  .2  .6 PIN    2.0D  60  5 WW