Northern California Seismicity Report for the week ending
Oct 31, 2002
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
- 16 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, 11 miles SW of Toms Place, CA at 01:08 AM UTC Monday, 10 28, 2002 (05:08 PM PST Sunday, Oct 27, 2002).
- 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 2.1, 6 miles ENE of Morgan Hill, CA at 02:59 PM UTC Thursday, 10 24, 2002 (07:59 AM PDT Thursday, Oct 24, 2002).
- 19 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 3.2, 11 miles SW of Toms Place, CA at 01:08 AM UTC Monday, 10 28, 2002 (05:08 PM PST Sunday, Oct 27, 2002).
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
2002 OCT 24 0720 43.21 38 48.98 122 47.26 0.77 22 .02 .1 .6 GEY 2.3D 41 1 WW
2002 OCT 24 1142 14.59 37 37.67 118 51.50 8.83 16 .06 .3 .6 SMO 2.1D 88 2 WW
2002 OCT 24 1459 52.07 37 9.65 121 33.15 5.74 69 .09 .1 .4 CYN 2.1D 71 6 NN
2002 OCT 24 2052 36.12 38 49.24 122 47.71 2.50 15 .03 .2 1.5 GEY 2.1D 40 8 WW
2002 OCT 26 0132 10.91 36 23.20 120 25.60 7.00 39 .08 .2 .2 COA 2.4D 109 8 NN
2002 OCT 26 0508 31.38 39 25.69 123 6.86 3.34 46 .29 .4 1.5 BAR 2.9D 91 17 NN
2002 OCT 26 1316 18.03 37 33.45 118 52.83 8.91 40 .08 .2 .6 MOR 1.8D 92 6 AA
2002 OCT 27 0049 35.62 39 26.08 123 6.44 5.00 30 .06 .1 .9 BAR 2.5D 42 16 NN
2002 OCT 27 0411 34.22 39 26.14 123 6.54 5.10 19 .06 .3 1.0 BAR 2.3D 131 17 NN
2002 OCT 27 2115 36.65 37 36.97 118 59.58 2.47 18 .07 .4 .2 MAM .9D 140 1 AA
2002 OCT 28 0108 40.91 37 27.90 118 50.45 7.69 54 .08 .3 .9 MOR 3.2D 79 9 AN
2002 OCT 28 1726 50.92 35 52.32 120 24.86 6.04 35 .05 .2 .2 GOL 2.3D 74 2 NN
2002 OCT 29 1822 3.34 38 48.11 122 48.70 2.24 17 .03 .2 .4 GEY 2.0D 47 2 WW
2002 OCT 29 2210 26.62 37 29.74 118 50.70 9.41 43 .08 .3 .8 MOR 2.9D 100 8 WW
2002 OCT 30 0502 9.09 37 32.29 118 48.37 4.50 37 .07 .3 .7 MOR 2.0D 109 3 WW
2002 OCT 30 1632 50.53 38 35.42 122 47.72 7.09 37 .11 .2 .5 ROG 2.3D 58 8 WW
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