Northern California Seismicity Report for the week ending
Mar 25, 2004
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
- 52 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 3.4, 11 miles WNW of Templeton, CA at 09:48 PM UTC Saturday, 03 20, 2004 (01:48 PM PST Saturday, Mar 20, 2004).
- 12 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 2.5, 1 miles ESE of Watsonville, CA at 06:18 PM UTC Monday, 03 22, 2004 (10:18 AM PST Monday, Mar 22, 2004).
- 3 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, 8 miles WSW of Toms Place, CA at 03:04 PM UTC Tuesday, 03 23, 2004 (07:04 AM PST Tuesday, Mar 23, 2004).
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
2004 MAR 18 0001 53.43 35 43.99 121 4.17 2.65 16 .14 .9 4.4 SSM 2.1D 127 16 WW
2004 MAR 18 0002 35.50 35 44.60 121 2.26 0.18 35 .11 .4 3.8 SSM 2.8D 135 12 WW
2004 MAR 18 0108 26.46 35 45.58 121 2.67 15.21 12 .12 2.3 1.4 SSM 2.1D 227 13 WW
2004 MAR 18 0141 7.35 35 43.72 121 4.68 0.04 64 .35 .4 4.2 SSM # 3.0D 72 9 WW
2004 MAR 18 0215 31.98 35 42.85 121 3.66 5.24 46 .04 .2 .4 SSM 2.7D 69 9 XW
2004 MAR 18 0404 14.82 35 44.00 121 2.96 1.18 18 .12 1.1 9.2 SSM - 2.1D 119 11 WW
2004 MAR 18 0420 4.05 35 43.77 121 4.86 5.01 36 .09 .2 .7 SSM 2.6D 74 8 XW
2004 MAR 18 0627 40.25 35 44.62 121 3.42 10.26 12 .28 1.2 3.2 SSM 2.0D 93 11 WW
2004 MAR 18 0706 16.52 35 36.37 120 56.42 3.56 44 .11 .4 .7 SSM 2.8D 122 8 WW
2004 MAR 18 0717 16.90 36 35.76 121 11.89 7.02 53 .05 .1 .4 PIN 2.5D 36 2 WW
2004 MAR 18 0818 20.59 35 43.27 121 4.66 5.33 28 .09 .3 .7 SSM 2.2D 69 8 XX
2004 MAR 18 0820 45.47 37 35.96 119 25.48 4.95 8 .05 1.4 8.9 KAI - 2.3D 193 31 WW
2004 MAR 18 0842 1.08 35 48.63 120 58.25 3.76 17 .15 1.7 5.9 ROB 2.1D 184 25 WW
2004 MAR 18 1051 30.88 35 43.98 121 3.89 0.12 21 .12 .3 5.1 SSM # 2.2D 69 10 WW
2004 MAR 18 1102 3.66 35 43.26 121 4.34 4.31 27 .13 .5 2.6 SSM 2.3D 108 9 WW
2004 MAR 18 1518 51.98 35 43.74 121 3.80 4.75 34 .15 .5 1.0 SSM 2.3D 143 15 WW
2004 MAR 18 2026 45.97 36 58.61 121 37.69 4.48 49 .11 .2 .4 SAR 2.2D 37 5 WW
2004 MAR 18 2259 6.62 35 48.22 121 1.64 3.18 25 .38 1.1 4.2 SSM 2.2D 190 11 WW
2004 MAR 19 0039 15.01 35 37.44 120 53.70 6.92 26 .11 .3 .6 SSM 2.1D 134 3 WW
2004 MAR 19 0101 16.87 35 43.24 121 3.91 4.69 28 .14 .3 .8 SSM 2.2D 64 9 XX
2004 MAR 19 0202 29.98 36 1.26 120 35.70 4.48 30 .11 .4 .5 SLA 2.2D 130 5 WW
2004 MAR 19 0645 57.28 35 32.09 120 47.64 0.63 61 .30 .4 4.8 SSM 2.8D 101 18 WW
2004 MAR 19 1907 15.74 38 45.22 122 42.83 2.17 18 .07 .3 .4 GEY 2.1D 80 2 WW
2004 MAR 19 1941 3.96 36 48.38 121 31.04 3.73 46 .14 .2 .4 SJB 2.4D 47 2 WW
2004 MAR 20 0124 17.28 35 36.01 120 52.44 4.35 38 .10 .3 .5 SSM 2.5D 108 5 WW
2004 MAR 20 0238 16.50 35 35.88 120 52.38 4.26 39 .09 .3 .6 SSM 2.5D 109 5 WW
2004 MAR 20 0311 5.51 35 43.81 120 57.45 0.63 19 .23 1.412.2 SSM # 2.0D 190 13 WW
2004 MAR 20 0740 40.00 35 39.60 121 5.53 5.18 20 .14 .4 1.6 SSM 2.2D 148 16 WW
2004 MAR 20 0759 50.24 35 40.05 121 5.65 4.64 18 .13 .6 1.1 SSM 2.3D 130 6 WW
2004 MAR 20 1440 8.47 35 43.05 121 0.75 4.68 31 .19 .6 1.0 SSM 2.5D 173 12 WW
2004 MAR 20 2148 25.19 35 36.06 120 53.04 0.02 74 .25 .3 2.0 SSM # 3.4L 110 20 WW
2004 MAR 21 1008 1.95 37 14.97 122 6.51 12.54 58 .12 .2 .4 BLM 2.4D 38 4 WW
2004 MAR 21 1031 10.82 38 48.08 122 48.51 5.06 22 .05 .2 .4 GEY 2.2D 37 1 WW
2004 MAR 21 1525 58.56 35 43.01 121 3.00 7.00 17 .14 .4 1.8 SSM 2.2D 67 10 WW
2004 MAR 21 1601 41.68 35 34.59 120 48.40 4.31 26 .05 .3 .7 SSM 2.1D 96 9 WW
2004 MAR 21 1658 49.10 35 35.24 120 52.17 6.07 22 .13 .6 .8 SSM 2.1D 125 6 WW
2004 MAR 21 2332 58.36 35 38.83 120 45.11 3.89 28 .12 .5 1.8 ROB 2.0D 148 20 WW
2004 MAR 22 0944 43.13 35 33.60 120 48.86 3.81 26 .10 .3 3.0 SSM 2.1D 68 21 WW
2004 MAR 22 1818 56.85 36 54.12 121 43.85 9.12 73 .11 .2 .4 SJB 2.5D 82 3 WW
2004 MAR 22 2103 57.51 35 38.83 120 56.89 4.80 44 .10 .2 .6 SSM 3.3L 66 7 WW
2004 MAR 23 0541 33.51 35 42.04 121 4.91 6.51 20 .46 1.2 6.9 SSM 2.0D 137 18 WW
2004 MAR 23 0632 11.63 35 43.18 121 2.70 7.97 17 .10 .6 1.3 SSM 2.2D 128 14 WW
2004 MAR 23 0810 0.27 38 47.27 122 46.51 2.41 18 .03 .2 .4 GEY 2.0D 47 3 WW
2004 MAR 23 1303 34.08 37 31.62 121 53.68 7.18 49 .10 .2 .5 MIS 2.0D 42 2 WW
2004 MAR 23 1308 16.14 38 49.37 122 49.51 2.13 28 .11 .2 .5 GEY 2.5D 76 3 WW
---ORIGIN TIME (UT)--- -LAT N-- --LON W-- DEPTH N RMS ERH ERZ LOC PREF AZ MIN S. PAGE 2
YEAR MON DA HRMN SEC DEG MIN DEG MIN KM RD SEC KM KM REMKS MAG GAP DS PF
2004 MAR 23 1549 21.35 35 38.67 120 57.11 5.27 36 .04 .2 1.2 SSM 2.5D 111 16 WW
2004 MAR 23 1849 31.65 35 40.69 121 5.65 5.17 14 .11 .9 3.4 SSM 2.2D 172 21 WW
2004 MAR 24 0209 54.87 39 37.73 121 8.06 4.68 9 .08 .5 6.5 WAK 2.2D 123 28 WW
2004 MAR 24 0216 13.88 35 44.39 121 2.48 1.79 45 .15 .4 2.6 SSM 2.7D 145 9 WW
2004 MAR 24 0632 2.77 35 39.30 121 4.27 6.16 20 .15 .7 2.9 SSM 2.2D 117 8 WW
2004 MAR 24 1117 12.87 40 52.72 123 37.84 26.24 8 .03 .8 1.1 EUR 2.0D 109 9 WW
2004 MAR 24 2006 13.67 39 37.82 121 8.14 8.97 10 .06 .5 4.0 WAK 2.0D 125 28 WW
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