Northern California Seismicity Report for the week ending Jun 10, 2004

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

• 28 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 3.8, 8 miles SW of San Simeon, CA at 08:40 AM UTC Sunday, 06 06, 2004 (01:40 AM PDT Sunday, Jun 06, 2004).

• 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 2.2, 4 miles NE of Pleasanton, CA at 04:05 PM UTC Wednesday, 06 09, 2004 (09:05 AM PDT Wednesday, Jun 09, 2004).

• 4 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 3.0, 9 miles SW of Toms Place, CA at 11:23 AM UTC Friday, 06 04, 2004 (04:23 AM PDT Friday, Jun 04, 2004).

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

2004 JUN  3 0705 12.97 35 43.24 121  4.87  6.91 57 .22  .4 1.5 SSM    2.8D 148 21 WW
2004 JUN  3 0921 15.03 35 36.73 120 54.00  7.03 41 .08  .2  .4 SSM    2.3D  74  4 XX
2004 JUN  3 1928 20.07 35 41.20 121  0.15  7.05 39 .16  .3 1.0 SSM    2.1D  72 13 XX
2004 JUN  3 2055 24.96 38 49.64 122 48.25  5.04 45 .12  .2  .4 GEY    3.5L  33  2 WW
2004 JUN  4 0013 59.39 36 49.16 120 53.10  0.63 40 .21  .5 2.5 ORT  # 2.2D 100  6 NN
 
2004 JUN  4 1006 11.68 35 43.11 121  6.11  5.98 29 .13  .3  .6 SSM    2.1D  80  6 XX
2004 JUN  4 1123 14.34 37 28.89 118 48.63  8.43 38 .07  .3  .8 MOR  # 3.0D 112  6 WW
2004 JUN  4 2340 51.79 35 39.49 121  3.63  6.12 13 .17  .5 1.6 SSM    2.2D 107  9 WW
2004 JUN  5 0246 51.56 35 32.90 121 17.88  4.39 54 .20  .5 1.5 SSM    3.6L 201 20 WW
2004 JUN  5 1305  9.41 38 48.49 122 46.15  2.79 20 .06  .2  .6 GEY    2.2D  46  2 WW
 
2004 JUN  5 1315 28.83 35 33.85 121 15.84  5.69 15 .12  .6  .9 SSM    2.5D 200 16 WW
2004 JUN  5 2034 55.17 35 33.41 121 16.78  4.12 16 .03  .4  .8 SSM    2.2D 226 18 XX
2004 JUN  6 0102 44.94 37 30.60 118 56.48 10.40 34 .07  .3  .9 SIL    2.1D 110 12 WW
2004 JUN  6 0420 45.23 35 40.86 121  6.30  6.31 31 .21  .7 1.1 SSM    2.2D 105  4 XX
2004 JUN  6 0840 52.87 35 33.10 121 17.06  4.20 53 .17  .4 1.1 SSM    3.8W 204 19 WW
 
2004 JUN  6 0857 10.40 35 35.69 121 14.95  6.60 17 .08  .7  .6 SSM    2.3D 218 13 WW
2004 JUN  6 1013 58.76 35 33.77 121 16.16  3.04 29 .13  .5 1.0 SSM    2.5D 201 17 XX
2004 JUN  6 1705 56.68 36 13.49 120 17.16 10.12  9 .11  .4  .8 COA    2.5D 112 14 WW
2004 JUN  7 0109 41.33 35 33.43 121 16.89  4.62 16 .04  .5  .9 SSM    2.2D 209 18 XX
2004 JUN  7 0513  2.43 35 44.92 121  1.76  7.44 35 .28  .7 1.7 SSM    2.5D 191 12 WW
 
2004 JUN  7 0827 21.15 36  1.85 120 37.32  5.85 28 .11  .4  .6 SLA    2.0D 145  7 WW
2004 JUN  7 0829  3.88 35 33.34 121 16.74  2.23 51 .22  .5 2.4 SSM    3.0D 190 18 WW
2004 JUN  8 0041 55.65 35 38.95 121  2.99  6.41 19 .19  .5 2.0 SSM    2.1D 108 10 XX
2004 JUN  9 0053 21.38 35 33.88 121 15.89  0.79 25 .17  .7 4.8 SSM    2.8D 200 19 WW
2004 JUN  9 0714 41.61 40 13.35 124  5.91 14.61  9 .12  .8  .9 MEN    2.8D 124  8 WW
 
2004 JUN  9 1605 54.96 37 42.47 121 50.13 17.89 55 .15  .3  .3 DAN    2.2D  64  2 WW
2004 JUN  9 1916 33.50 35 37.48 120 58.77  5.51 18 .17  .4 1.1 SSM    2.2D  81 10 WW
2004 JUN  9 2037 35.67 35 37.32 121  1.70 10.66  8 .07  .6 1.4 SSM    2.1D 120 12 WW