Northern California Seismicity Report for the week ending
Mar 15, 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
- 13 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 an earthquake of magnitude 3.8, 6 miles N of Lake Pillsbury, CA at 10:11 AM UTC Sunday, 03 11, 2001 (02:11 AM PST Sunday, Mar 11, 2001).
This is the largest earthquake in this region since we recorded a magnitude 4.2 quake on May 17, 2000.
Earthquakes are not uncommon in the region as we have recorded nearly 300 quakes there that were
magnitude 2.0 or larger since January 1, 1990.
More that 30 of those were magnitude 3.0 or larger.
- 10 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 2.0, 3 miles SSW of Glen Ellen, CA at 10:21 AM UTC Tuesday, 03 13, 2001 (02:21 AM PST Tuesday, Mar 13, 2001).
- 10 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 2.1, 9 miles SSE of Toms Place, CA at 02:18 AM UTC Monday, 03 12, 2001 (06:18 PM PST Sunday, Mar 11, 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 MAR 8 0122 51.01 38 45.70 122 42.59 2.32 22 .06 .2 .2 GEY 2.2D 80 1 NN
2001 MAR 9 1739 42.40 40 14.13 124 10.03 11.85 13 .13 .5 .6 MEN 2.3D 89 5 NN
2001 MAR 11 0441 53.83 39 43.62 123 10.28 0.50 23 .08 .2 3.0 BAR # 2.2D 46 18 NN
2001 MAR 11 1011 7.43 39 29.29 122 56.87 17.31 57 .25 .3 .5 BAR 3.8L 34 22 NN
2001 MAR 11 1141 27.48 38 51.02 122 49.49 1.62 32 .04 .1 .3 GEY 2.2D 45 4 NN
2001 MAR 12 0218 27.49 37 26.27 118 38.42 6.37 31 .05 .3 .3 RVL 2.1D 118 1 NN
2001 MAR 12 0520 38.93 38 47.69 122 47.91 5.04 39 .05 .1 .2 GEY 2.3D 53 1 NN
2001 MAR 12 0640 2.66 36 35.71 121 12.14 8.98 54 .07 .1 .2 PIN 2.2D 33 3 NN
2001 MAR 12 0700 37.21 39 29.58 122 56.80 11.08 26 .06 .2 .3 BAR 2.1D 46 1 NN
2001 MAR 12 1332 21.39 39 30.57 122 56.73 10.10 23 .18 .4 .7 BAR 2.4D 42 2 WW
2001 MAR 13 0323 11.95 36 36.18 121 12.39 6.79 37 .06 .2 .4 PIN 2.3D 41 3 WW
2001 MAR 13 0514 40.20 36 29.94 121 4.37 3.65 29 .05 .2 .3 BIT 2.2D 68 1 WW
2001 MAR 13 1021 0.52 38 19.48 122 32.83 6.12 27 .07 .2 .3 ROG 2.0D 50 4 WW
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