Northern California Seismicity Report for the week ending Jun 21, 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

• 11 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 3.3, 9 miles WNW of Punta Gorda, CA at 04:26 AM UTC Saturday, 06 16, 2001 (09:26 PM PDT Friday, Jun 15, 2001).

• 8 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 1.8, 2 miles N of Hollister, CA at 11:51 PM UTC Sunday, 06 17, 2001 (04:51 PM PDT Sunday, Jun 17, 2001).

• 9 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 2.8, 11 miles SW of Toms Place, CA at 07:08 PM UTC Sunday, 06 17, 2001 (12:08 PM PDT Sunday, Jun 17, 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 JUN 14 1321 26.21 37 38.30 119 24.11  1.45 44 .13  .3 5.9 KAI  # 2.3D  45 28 NN
2001 JUN 14 1843 29.83 37 38.71 119 24.31  2.12 40 .31  .6 8.9 KAI  # 2.7D  44 29 NN
2001 JUN 15 0812 47.51 35 15.30 120 55.62  6.92 22 .05  .5  .2 SSM    2.1D 175  4 NN
2001 JUN 15 0926  8.50 39 17.71 122 47.77  1.51 17 .30  .511.9 BAR  # 2.1D  55 24 WW
2001 JUN 15 1112 31.66 39 17.09 122 48.23 10.11 43 .23  .3 1.2 BAR    2.5D  37 17 NN
 
2001 JUN 16 0426 53.33 40 18.17 124 31.75 20.94 25 .08 1.1  .3 MEN    3.3D 233 20 NN
2001 JUN 17 0040 29.86 36 28.09 121  2.83  7.03 51 .07  .1  .4 BIT    2.2D  71  5 NN
2001 JUN 17 1842 56.17 36 28.02 121  2.82  7.04 49 .06  .1  .3 BIT    2.2D  57  5 NN
2001 JUN 17 1908 53.25 37 28.41 118 50.22  4.42 33 .07  .3  .7 MOR    2.8D  86  9 NN
2001 JUN 19 0725 55.41 37 32.37 118 48.83  7.03 32 .07  .3  .7 MOR    2.0D 109  4 WW
 
2001 JUN 19 0922  2.92 36  0.25 120 32.56 13.89 25 .03  .3  .4 SLA    2.1D  91  6 WW