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
Information about seismicity for other regions is available from the U.S. Geological Survey Earthquake Hazards Program Website. 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 provided at the Northern California Maps of Recent Earthquake Activity website. 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
The largest event to occur this week in this region was a minor earthquake of magnitude 3.0, 16 miles SE of Blue Lake, CA at 07:44 AM UTC Wednesday, 11 21, 2007 (11:44 PM PST Tuesday, Nov 20, 2007).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 7 miles E of Milpitas, CA at 11:33 PM UTC Thursday, 11 15, 2007 (03:33 PM PST Thursday, Nov 15, 2007).
The largest event to occur this week in this region was a microearthquake of magnitude 2.0, 9 miles SE of Mammoth Lakes, CA at 07:01 PM UTC Thursday, 11 15, 2007 (11:01 AM PST Thursday, Nov 15, 2007).
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 2007 NOV 15 0033 35.08 36 41.14 121 16.82 5.20 63 .06 .1 .3 2.3D 76 2 2007 NOV 15 1103 16.99 37 46.73 121 57.10 9.75 61 .10 .1 .3 2.1D 53 10 2007 NOV 15 1103 50.43 37 46.93 121 57.07 10.18 72 .12 .2 .3 2.0D 55 9 2007 NOV 15 1136 30.61 38 49.35 122 48.55 3.50 65 .06 .1 .2 2.1D 44 0 2007 NOV 15 1901 28.40 37 32.44 118 52.72 9.22 41 .08 .3 .6 2.0D 101 7 2007 NOV 15 2333 23.74 37 25.98 121 46.65 9.05101 .08 .1 .3 2.4D 50 3 2007 NOV 16 1340 59.77 37 25.84 121 46.84 6.60 85 .06 .1 .3 2.0D 50 3 2007 NOV 16 1410 54.49 38 45.06 122 43.72 2.43 44 .08 .1 .2 2.2D 26 2 2007 NOV 16 1411 20.82 38 45.31 122 43.94 1.82 36 .08 .2 .3 2.2D 38 2 2007 NOV 16 2015 42.41 38 2.98 121 51.57 16.98 48 .21 .4 .4 2.2D 121 11 2007 NOV 17 0246 2.87 38 49.50 122 48.03 3.28 38 .07 .2 .2 2.8D 35 1 2007 NOV 17 1026 46.19 36 19.00 120 0.98 23.13 46 .13 .8 .3 2.3D 115 10 2007 NOV 18 0046 58.13 38 45.57 122 43.86 1.77 65 .07 .1 .2 2.5D 16 1 2007 NOV 18 0156 27.57 38 48.18 122 45.93 0.91 48 .06 .1 .2 2.7D 32 2 2007 NOV 19 0007 24.49 36 42.91 121 21.53 2.61 54 .06 .1 .3 2.1D 55 2 2007 NOV 19 0235 21.42 36 10.62 120 8.15 8.05 54 .12 .2 .4 2.5D 118 9 2007 NOV 19 0559 44.81 37 18.69 121 40.75 8.44 96 .09 .1 .3 2.1D 42 5 2007 NOV 19 1558 31.26 38 47.55 122 45.94 2.16 63 .06 .1 .2 2.4D 32 1 2007 NOV 19 1954 20.45 40 8.82 123 49.10 21.03 15 .10 .3 .5 2.2D 115 11 2007 NOV 20 0015 27.75 36 35.30 121 11.19 5.12 60 .06 .1 .4 2.6D 33 9 2007 NOV 20 1013 9.19 36 35.29 121 11.17 5.14 51 .05 .1 .5 2.2D 38 9 2007 NOV 20 2249 32.48 38 49.35 122 47.73 3.42 47 .07 .2 .2 2.1D 52 1 2007 NOV 21 0406 46.84 37 22.09 122 9.32 7.01 65 .15 .2 .3 2.1D 38 3 2007 NOV 21 0744 51.69 40 42.42 123 46.56 27.55 24 .11 .3 1.0 3.0L 96 19 2007 NOV 21 1312 42.95 37 52.11 121 45.82 21.20 53 .18 .8 .2 2.2D 160 7
