Northern California Seismicity Report for the week ending Jan 04, 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

• 24 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 3.7, 12 miles N of Bishop, CA at 02:45 AM UTC Friday, 12 29, 2000 (06:45 PM PST Thursday, Dec 28, 2000).

• 13 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 2.5, 3 miles WNW of San Juan Bautista, CA at 08:33 PM UTC Friday, 12 29, 2000 (12:33 PM PST Friday, Dec 29, 2000).

• 21 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 SW of Toms Place, CA at 05:42 AM UTC Tuesday, 01 02, 2001 (09:42 PM PST Monday, Jan 01, 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

2000 DEC 28 1720 40.96 37 33.71 118 51.79  5.93 34 .06  .2  .4 MOR    2.3D 103  4 NN
2000 DEC 28 1855 20.22 39 17.39 122 48.20  0.65 18 .23  .513.2 BAR    2.0D 106 17 WW
2000 DEC 29 0245 11.47 37 32.27 118 26.18  6.93 31 .06  .3 1.2 CHV    3.7D  91 10 NN
2000 DEC 29 0720 35.87 38 55.84 123  0.45  6.76 31 .06  .1  .5 MAA    2.0D  31 11 NN
2000 DEC 29 1118  0.91 40  8.92 123 49.45 19.75 24 .14  .3  .2 MEN    2.2D 131  6 NN
 
2000 DEC 29 1337 36.79 37 32.36 118 26.33  5.83 30 .07  .3  .5 CHV    2.2D  90  1 NN
2000 DEC 29 1556 57.80 41  0.19 121 42.44  2.53 25 .28  .522.4 SHA  - 2.3D  78 27 NN
2000 DEC 29 2033 32.28 36 51.76 121 35.67  7.45 58 .08  .2  .3 SJB    2.5D  49  2 NN
2000 DEC 29 2246 18.00 36 37.02 121 13.27  7.09 68 .07  .1  .3 PIN    3.3D  26  5 NN
2000 DEC 29 2337  6.39 36 36.89 121 13.23  6.57 54 .05  .1  .3 PIN    2.5D  41  5 NN
 
2000 DEC 30 0824  8.69 40 29.42 124  9.41 26.02 15 .06  .4  .6 EUR    2.3D 103  9 NN
2000 DEC 30 1053 34.52 37 32.21 118 26.30  5.45 33 .06  .2  .5 CHV    2.4D  90  1 NN
2000 DEC 30 1830  5.52 37 32.26 118 26.39  5.40 28 .06  .3  .6 CHV    3.0D 121  1 WW
2000 DEC 30 2147  7.96 38 48.96 122 47.27  1.71 41 .06  .1  .5 GEY    2.9D  41  1 NN
2000 DEC 30 2248  6.60 40 25.66 123 24.67 26.88 24 .06  .3  .8 EUR    2.4D  55 15 NN
 
2000 DEC 31 0435 46.52 40 59.28 121 41.54  3.96  9 .07  .3 8.2 SHA  - 3.0D 119 27 WW
2000 DEC 31 0711 10.65 37 28.99 118 50.24  3.71 31 .07  .3  .9 MOR    2.2D 126 10 WW
2000 DEC 31 2132 50.75 38 45.18 122 42.90  2.92 16 .05  .2  .6 GEY    2.0D  53  2 WW
2001 JAN  1 0705 18.91 40 34.29 122 14.26 19.76  9 .04  .4 1.1 SHA    2.0D  75 20 NN
2001 JAN  1 1631 17.43 40 37.85 121 52.04 20.40 11 .04 1.1  .6 SHA    2.0D 115  7 NN
 
2001 JAN  2 0542  4.25 37 28.34 118 48.35  8.38 31 .04  .3  .8 MOR    2.4D 179  8 NN
2001 JAN  2 1237 22.06 38 48.81 122 48.79  4.42 31 .04  .1  .3 GEY    2.1D  36  2 NN
2001 JAN  2 1416 43.28 36 56.94 120 16.24 11.98 20 .10  .4  .6 JQN    2.3D 114 38 NN
2001 JAN  3 0958  1.55 40 34.09 122 14.47 20.38 14 .07  .3  .6 SHA    2.5D  76 19 WW