Northern California Seismicity Report for the week ending
Oct 18, 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
- 17 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 3.2, 3 miles ESE of The Geysers, CA at 05:14 AM UTC Saturday, 10 13, 2001 (10:14 PM PDT Friday, Oct 12, 2001).
- 5 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 2.3, 2 miles W of Concord, CA at 11:05 PM UTC Sunday, 10 14, 2001 (04:05 PM PDT Sunday, Oct 14, 2001).
- 7 M >1.2 earthquakes in the Long Valley region
(map).
The largest event to occur this week in this region was an earthquake of magnitude 1.6, 7 miles W of Toms Place, CA at 02:32 PM UTC Friday, 10 12, 2001 (07:32 AM PDT Friday, Oct 12, 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 OCT 11 1331 4.62 36 43.24 121 21.84 2.87 42 .07 .2 .3 STN 2.1D 45 2 WW
2001 OCT 12 0214 35.89 39 21.34 123 17.14 5.70 16 .03 .2 1.4 MAA 2.0D 69 17 WW
2001 OCT 12 0725 55.53 38 47.79 122 44.46 2.32 17 .05 .2 .5 GEY 2.0D 47 3 WW
2001 OCT 12 1254 5.94 39 21.05 123 17.96 0.04 43 .34 .4 1.7 MAA # 2.6D 72 16 NN
2001 OCT 12 1833 35.98 39 21.34 123 17.34 6.08 25 .02 .2 .9 MAA 2.1D 70 17 NN
2001 OCT 13 0514 38.49 38 46.99 122 44.96 1.24 42 .07 .1 .4 GEY 3.2L 31 3 NN
2001 OCT 13 1712 36.73 38 46.62 122 43.14 2.73 35 .07 .1 .2 GEY 2.5D 45 0 NN
2001 OCT 13 1813 5.13 39 21.58 123 16.88 2.51 13 .13 .412.1 MAA - 2.1D 82 17 WW
2001 OCT 14 0041 9.57 38 48.03 122 46.66 0.93 36 .05 .1 .2 GEY 2.4D 40 2 NN
2001 OCT 14 1519 9.14 39 21.20 123 17.01 0.02 32 .06 .1 .8 MAA # 2.2D 69 16 NN
2001 OCT 14 2041 17.60 36 32.90 120 44.24 7.04 25 .08 .3 .6 CRV 2.5D 214 14 NN
2001 OCT 14 2305 55.13 37 58.92 122 3.74 18.72 56 .13 .2 .3 CON 2.3D 84 6 NN
2001 OCT 15 2002 31.92 38 46.34 122 44.57 2.90 34 .05 .1 .3 GEY 2.3D 38 2 NN
2001 OCT 15 2346 41.55 36 33.64 121 3.34 9.61 47 .13 .2 .4 BVL 2.8D 47 2 WW
2001 OCT 16 0106 34.54 36 33.47 121 3.35 9.15 49 .11 .2 .3 BVL 2.4D 48 3 NN
2001 OCT 16 0212 27.22 38 55.65 123 12.27 0.66 19 .08 .2 5.7 PAR # 2.2D 63 18 WW
2001 OCT 17 1333 27.64 38 46.85 122 42.93 2.53 17 .06 .2 .4 GEY 2.1D 46 1 WW
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