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Science Forum Index » Geology Forum » Weekly USGS Quake Report 03Dec04
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| USGS N. Cal. Quake Report |
 Posted: Thu Dec 04, 2003 3:36 pm |
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Thank you, the weekly report crew
Seismicity Report for Northern California
Northern California Seismicity Report for the week ending Dec 04, 2003
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 at
http://wwwneic.cr.usgs.gov/current_seismicity.shtml. In addition, all
earthquake data can be retrieved from the Northern California Earthquake
Data Center at http://quake.geo.berkeley.edu/cnss/catalog-search.html.
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
15 M >2.0 earthquakes in Northern and Central California see
http://quake.wr.usgs.gov/recent/weekreps/latest/cencal.gif (map) (within
dashed polygon of figure). The largest event to occur this week in this
region was a minor earthquake of magnitude 3.3, 4 miles NNE of New Idria,
CA at 10:08 PM UTC Friday, 11 28, 2003 (02:08 PM PST Friday, Nov 28,
2003).
11 M >1.2 earthquakes in the San Francisco Bay area see
http://quake.wr.usgs.gov/recent/weekreps/latest/sfbay.gif (map). The
largest event to occur this week in this region was a microearthquake of
magnitude 2.1, 4 miles S of Saint Helena, CA at 07:20 AM UTC Sunday, 11
30, 2003 (11:20 PM PST Saturday, Nov 29, 2003).
10 M >1.2 earthquakes in the Long Valley region see
http://quake.wr.usgs.gov/recent/weekreps/latest/lvc.gif (map). The
largest event to occur this week in this region was a microearthquake of
magnitude 2.5, 8 miles WSW of Toms Place, CA at 04:29 AM UTC Saturday, 11
29, 2003 (08:29 PM PST Friday, Nov 28, 2003).
The following table provides a listing of all M >2 earthquakes that
occurred this week. An
(http://quake.wr.usgs.gov/recent/weekreps/sumlist_doc.html) 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
2003 NOV 27 0113 58.38 37 41.68 119 24.88 23.40 11 .04 .8 2.1 KAI 2.1D 119 30 WW
2003 NOV 27 0833 13.82 39 46.36 123 28.53 0.02 24 .40 .6 5.1 MAA # 2.7D 83 13 WW
2003 NOV 27 1001 32.49 36 45.42 119 18.96 0.03 13 .14 1.1 9.2 KAI # 2.8D 150 56 QN
2003 NOV 27 1816 0.97 36 58.19 121 35.28 1.22 46 .27 .3 .7 SAR 2.1D 30 2 WW
2003 NOV 27 2015 24.53 40 24.18 122 1.33 20.55 10 .46 2.0 5.4 SHA 2.0D 115 20 WW
2003 NOV 28 0445 44.82 39 47.02 123 27.99 0.08 20 .24 .3 4.8 MAA # 2.4D 84 15 WW
2003 NOV 28 1145 26.95 40 38.75 122 25.63 15.31 9 .12 .5 1.2 SHA # 2.2D 141 25 WW
2003 NOV 28 1600 31.24 38 47.70 122 45.90 2.61 15 .04 .2 .6 GEY 2.0D 46 3 WW
2003 NOV 28 2208 54.67 36 27.88 120 38.77 10.68 81 .16 .2 .6 CRV 3.3L 53 19 WW
2003 NOV 29 0339 3.33 37 31.70 118 49.12 6.73 41 .07 .2 .6 MOR 2.2D 96 7 QQ
2003 NOV 29 0429 54.75 37 31.36 118 49.12 0.02 20 .48 1.2 1.7 MOR # 2.5D 165 8 WW
2003 NOV 29 2313 22.80 40 38.10 122 10.74 3.26 22 .49 .922.7 SHA # 2.2D 78 20 WW
2003 NOV 30 0207 6.47 39 44.83 123 30.45 4.73 9 .18 1.4 1.6 MAA 2.3D 146 9 WW
2003 NOV 30 0720 52.41 38 26.42 122 27.80 11.52 25 .16 .3 1.0 NAP 2.1D 83 14 WW
2003 DEC 3 2350 23.04 39 29.34 122 18.23 32.34 11 .14 .7 1.4 SAC 2.2D 66 13 WW |
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