Northern California Seismicity Report for the week ending
Feb 01, 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, 2 miles N of The Geysers, CA at 08:04 PM UTC Tuesday, 01 30, 2001 (12:04 PM PST Tuesday, Jan 30, 2001).
- 11 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 2.9, 2 miles NNW of Hollister, CA at 08:23 PM UTC Tuesday, 01 30, 2001 (12:23 PM PST Tuesday, Jan 30, 2001).
- 12 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 1.9, 11 miles WSW of Toms Place, CA at 05:17 PM UTC Saturday, 01 27, 2001 (09:17 AM PST Saturday, Jan 27, 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 JAN 25 0618 22.61 35 48.01 121 20.95 3.45 49 .05 .2 .3 SSM 2.5D 182 11 NN
2001 JAN 25 1100 9.44 38 46.41 122 44.91 1.82 34 .07 .1 .3 GEY 2.4D 31 3 NN
2001 JAN 26 0341 0.61 38 33.18 123 21.79 6.33 39 .14 .5 .4 MAR 3.0D 188 16 NN
2001 JAN 27 0329 23.21 38 33.19 123 21.20 0.40 28 .25 1.5 7.5 MAR 2.0D 203 15 NN
2001 JAN 27 1028 7.68 36 52.90 121 24.74 8.49 69 .08 .1 .4 HOL 2.8D 33 10 NN
2001 JAN 27 1644 3.51 39 34.18 122 1.42 22.17 20 .07 .3 .7 SAC 2.4D 125 36 NN
2001 JAN 27 1838 10.01 36 9.88 120 44.25 9.25 57 .10 .2 .3 BIT 2.8D 64 6 NN
2001 JAN 27 1848 20.83 36 9.92 120 44.40 9.35 44 .08 .2 .3 BIT 2.2D 67 6 NN
2001 JAN 28 1006 56.86 38 49.98 122 47.69 1.33 39 .06 .1 .3 GEY 2.5D 32 3 NN
2001 JAN 28 1031 17.86 40 17.46 121 28.91 1.16 11 .04 .4 2.2 ALM 2.2D 171 13 NN
2001 JAN 28 2330 12.68 36 53.18 118 14.30 9.69 30 .06 1.1 1.2 OWV 2.0D 210 51 NN
2001 JAN 29 0329 57.51 38 47.90 122 43.78 3.28 35 .07 .1 .3 GEY 2.4D 30 3 NN
2001 JAN 29 0603 37.91 35 51.99 119 56.36 25.97 31 .15 .5 .7 COA 2.1D 120 26 NN
2001 JAN 30 2004 15.84 38 49.36 122 48.43 3.82 44 .08 .2 .3 GEY 3.2D 35 2 WW
2001 JAN 30 2023 4.61 36 53.06 121 24.72 8.31 69 .08 .2 .4 HOL 2.9D 63 10 WW
2001 JAN 31 0510 59.82 37 14.04 118 35.41 8.06 20 .04 .5 .9 KAI 2.3D 225 12 WW
2001 JAN 31 0838 7.22 38 0.17 121 52.13 17.25 55 .19 .3 .4 GRN 2.3D 117 11 WW
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