Northern California Seismicity Report for the week ending Nov 14, 2002

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

• 13 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 light earthquake of magnitude 4.2, 7 miles NW of Parkfield, CA at 04:48 PM UTC Tuesday, 11 12, 2002 (08:48 AM PST Tuesday, Nov 12, 2002).

• 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 2.7, 6 miles N of Boulder Creek, CA at 06:53 AM UTC Wednesday, 11 13, 2002 (10:53 PM PST Tuesday, Nov 12, 2002).

• 19 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 2.4, 9 miles SSE of Toms Place, CA at 02:52 AM UTC Sunday, 11 10, 2002 (06:52 PM PST Saturday, Nov 09, 2002).

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

2002 NOV  7 2217 25.35 36 41.70 121 19.69  4.73 52 .05  .1  .3 STN    2.3D  45  2 NN
2002 NOV  9 0100 22.56 36 43.61 121 23.22  6.77 47 .06  .1  .3 SJB    2.0D  44  3 NN
2002 NOV  9 1128 33.97 36 49.46 121 32.87  3.96 48 .08  .2  .3 SJB    2.7D  38  3 NN
2002 NOV  9 1623 51.91 37 36.24 118 54.97  5.20 38 .08  .2  .2 SHE    2.1D 113  1 AA
2002 NOV 10 0252 58.56 37 26.18 118 36.95 13.16 35 .08  .2  .6 RVL    2.4D  66  2 AA
 
2002 NOV 10 1346 32.62 38 36.23 122 48.47  7.82 34 .11  .2  .6 ROG    2.5D  54  9 NN
2002 NOV 10 2123 29.75 37 35.17 118 50.24 10.28 14 .05  .5 1.2 MOR     .9D 109  4 AA
2002 NOV 10 2354 40.05 36 34.56 121 10.18  5.80 40 .05  .1  .4 PIN    2.0D  37  2 NN
2002 NOV 12 0442 40.26 36  3.97 120 12.08  9.07 31 .05  .1  .3 COA    2.1D  66  8 NN
2002 NOV 12 0634 33.86 37 27.54 118 50.52  7.97 34 .07  .3  .8 MOR    1.5D 127 11 AA
 
2002 NOV 12 1648 25.10 35 58.23 120 31.48  8.51 55 .07  .2  .2 MID  # 4.2W  46  3 NN
2002 NOV 13 0653 41.52 37 12.75 122  6.88 11.99 64 .13  .2  .4 BLM    2.7D  65  5 WW
2002 NOV 13 2344 18.24 37 38.66 118 56.71  7.35 18 .03  .3  .6 SMO    2.3D  61  2 WW