Northern California Seismicity Report for the week ending Dec 06, 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 a minor earthquake of magnitude 3.4, 8 miles WSW of Toms Place, CA at 09:26 PM UTC Sunday, 12 02, 2001 (01:26 PM PST Sunday, Dec 02, 2001).

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

The largest event to occur this week in this region was a microearthquake of magnitude 2.8, 4 miles SW of Napa, CA at 11:05 PM UTC Monday, 12 03, 2001 (03:05 PM PST Monday, Dec 03, 2001).

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

The largest event to occur this week in this region was a minor earthquake of magnitude 3.4, 8 miles WSW of Toms Place, CA at 09:26 PM UTC Sunday, 12 02, 2001 (01:26 PM PST Sunday, Dec 02, 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 NOV 29 0037 41.77 38 53.28 123 38.82  7.34 31 .12  .7 1.0 PAR    3.1L 226 38 NN
2001 NOV 29 0149  5.29 36  1.25 120 57.82  8.22 52 .04  .1  .3 ROB    2.2D  45  7 NN
2001 NOV 29 1352 46.95 38 49.86 122 51.37  1.69 15 .05  .3  .6 GEY    2.1D  85  5 WW
2001 NOV 29 2200 53.59 37 20.80 118 30.91 11.57 21 .05  .5  .8 KAI    3.0D 126  4 WW
2001 NOV 30 0104 34.35 37 20.84 118 30.93 11.33 19 .05  .5  .9 KAI    2.2D 125  4 WW
 
2001 NOV 30 1244 18.05 36 35.11 121 11.19  6.49 23 .04  .2  .4 PIN    2.2D  92  1 WW
2001 DEC  1 1632 19.32 36 11.90 120 18.97 10.61 27 .06  .2  .2 COA    2.2D  55  6 NN
2001 DEC  2 2002 56.38 38 50.95 122 48.13  1.98 24 .05  .2  .5 GEY    2.5D  43  5 NN
2001 DEC  2 2126 49.56 37 31.83 118 49.05  6.53 26 .06  .3  .7 MOR    3.4L 111  7 NN
2001 DEC  2 2142 39.19 37 32.12 118 48.95  6.53 28 .06  .3  .7 MOR    2.5D 110  6 NN
 
2001 DEC  2 2320 53.61 37 31.91 118 49.32  6.53 28 .08  .3  .8 MOR    2.3D 112  6 NN
2001 DEC  2 2326 13.71 37 31.62 118 49.19  6.00 26 .04  .2  .5 MOR    2.3D 113  7 NN
2001 DEC  3 0009 41.42 37 31.60 118 49.31  6.42 25 .06  .2  .6 MOR    2.7D 113  7 NN
2001 DEC  3 0019 19.56 37 32.32 118 48.55  3.10  9 .06  .6 2.2 MOR    2.2D 186 10 WW
2001 DEC  3 0050  3.95 37 31.60 118 49.34  6.61 28 .06  .3  .6 MOR    2.2D 113  7 NN
 
2001 DEC  3 2136 39.48 37 35.18 118 48.19  6.43 24 .09  .3  .6 MOR    2.1D  90  2 NN
2001 DEC  3 2305 33.48 38 15.87 122 20.34  9.51 56 .21  .2  .6 NAP    2.8D  47 11 WW
2001 DEC  4 0751 33.99 38 49.40 122 49.48  1.23 15 .05  .2  .5 GEY    2.2D  77  3 WW
2001 DEC  4 0753 50.11 38 49.45 122 49.48  0.91  9 .03  .3 1.3 GEY    2.2D  95  6 WW