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 3.5, 6 miles SSE of Parkfield, CA at 02:44 PM UTC Sunday, 11 23, 2008 (06:44 AM PST Sunday, Nov 23, 2008).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.1, 6 miles NE of American Canyon, CA at 01:04 AM UTC Monday, 11 24, 2008 (05:04 PM PST Sunday, Nov 23, 2008).
The largest event to occur this week in this region was a microearthquake of magnitude 1.6, 12 miles SW of Toms Place, CA at 03:17 AM UTC Saturday, 11 22, 2008 (07:17 PM PST Friday, Nov 21, 2008).
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 2008 NOV 20 0837 2.15 38 47.39 122 47.90 4.22 75 .07 .1 .2 2.8D 22 0 2008 NOV 21 0621 27.14 36 17.28 120 50.98 10.59 62 .09 .2 .5 2.6D 66 8 2008 NOV 21 1502 26.22 38 45.93 122 43.50 1.45 64 .08 .1 .2 3.0L 24 1 2008 NOV 21 1514 29.55 38 47.23 122 44.86 2.88 55 .07 .1 .2 2.1D 40 2 2008 NOV 21 1731 15.93 36 47.83 121 31.32 7.23 64 .09 .2 .3 2.1D 35 3 2008 NOV 21 1833 18.39 38 46.56 122 43.19 2.21 53 .06 .1 .2 2.2D 29 0 2008 NOV 21 2000 46.02 38 49.78 122 45.61 1.18 41 .08 .1 .2 2.1D 47 1 2008 NOV 23 0835 26.51 38 49.56 122 48.07 1.73 69 .07 .1 .1 2.1D 30 1 2008 NOV 23 1444 5.10 35 49.66 120 22.85 7.16 74 .09 .1 .2 3.5L 27 2 2008 NOV 23 2133 3.19 36 26.26 120 39.69 17.26 80 .14 .2 .5 2.9D 79 16 2008 NOV 24 0104 48.19 38 14.49 122 10.64 9.54102 .18 .2 .4 3.1L 85 5 2008 NOV 24 0554 26.68 35 33.55 120 47.16 2.86 68 .10 .2 1.1 2.3D 43 11 2008 NOV 24 0907 48.69 37 16.42 119 21.92 30.07 35 .05 .4 .8 2.6D 100 7 2008 NOV 25 0210 23.80 36 33.90 121 6.57 9.89 52 .06 .1 .2 2.3D 52 6 2008 NOV 25 0226 57.59 36 14.49 120 47.71 9.45 41 .08 .3 .6 2.0D 82 15 2008 NOV 25 1753 4.67 38 49.29 122 49.46 2.62 63 .07 .1 .2 2.6D 35 1 2008 NOV 25 1845 18.23 38 47.81 122 48.44 17.90 14 .10 1.8 1.5 2.3L 113 1 2008 NOV 25 1947 47.41 40 22.73 123 59.45 28.55 16 .08 .4 1.1 2.2D 89 12 2008 NOV 26 0709 26.53 38 47.51 122 45.40 1.65 41 .07 .1 .2 2.0D 42 1 2008 NOV 26 1058 2.48 36 2.03 120 5.24 10.21 55 .14 .4 .2 2.4D 162 4 2008 NOV 26 1610 30.56 38 50.55 122 49.67 2.43 49 .07 .2 .2 2.2D 38 1
