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 3.2, 10 miles WSW of Toms Place, CA at 11:35 PM UTC Thursday, 07 10, 2008 (04:35 PM PDT Thursday, Jul 10, 2008).
The largest event to occur this week in this region was a microearthquake of magnitude 2.8, 6 miles S of Gilroy, CA at 07:46 PM UTC Sunday, 07 13, 2008 (12:46 PM PDT Sunday, Jul 13, 2008).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.2, 10 miles WSW of Toms Place, CA at 11:35 PM UTC Thursday, 07 10, 2008 (04:35 PM PDT Thursday, Jul 10, 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 JUL 9 0012 1.35 35 39.97 119 38.37 31.74 44 .22 .8 4.1 2.5D 62 39 2008 JUL 9 0053 55.59 37 19.95 118 31.96 13.59 42 .06 .3 .5 3.0L 87 4 2008 JUL 9 2004 36.38 37 31.85 118 37.04 10.28 41 .07 .2 .6 2.4D 44 8 2008 JUL 9 2307 49.72 35 45.60 121 11.26 7.22 55 .08 .2 .4 2.5D 74 4 2008 JUL 10 1144 40.46 38 49.35 122 49.51 2.50 38 .07 .2 .2 2.1D 71 1 2008 JUL 10 2335 34.62 37 29.00 118 50.46 5.26 43 .06 .2 .7 3.2W 73 11 2008 JUL 10 2336 10.70 37 28.96 118 50.33 4.81 8 .03 1.7 7.1 2.8D 162 10 2008 JUL 11 0308 9.68 38 3.29 121 59.09 18.42 21 .09 .6 .5 2.1D 171 13 2008 JUL 11 0452 31.95 38 15.91 122 10.84 10.42 44 .17 .3 .6 2.3D 101 4 2008 JUL 11 1102 3.11 35 38.31 120 45.30 5.84 69 .14 .2 1.0 2.3D 25 10 2008 JUL 11 1116 46.36 40 20.91 124 21.97 19.54 11 .20 1.1 .6 2.0D 213 12 2008 JUL 12 0007 11.82 39 21.67 123 17.12 0.61 23 .04 .2 2.6 2.1D 44 17 2008 JUL 12 0233 46.26 38 49.20 122 47.58 2.50 56 .07 .2 .2 2.2D 42 1 2008 JUL 12 0748 6.39 38 45.77 122 43.66 3.30 50 .07 .1 .3 2.0D 42 2 2008 JUL 12 0924 27.27 38 3.06 122 0.42 19.17 66 .13 .3 .2 2.3D 126 3 2008 JUL 12 1137 38.50 36 41.33 121 19.23 3.96 25 .06 .2 .5 2.1D 46 3 2008 JUL 12 1138 18.76 36 41.35 121 19.15 4.09 66 .06 .1 .2 3.0D 33 3 2008 JUL 12 1300 35.15 40 3.22 123 49.68 24.00 21 .12 .4 1.0 2.5D 128 19 2008 JUL 13 0644 40.05 38 45.00 122 43.83 2.17 63 .08 .1 .2 2.9D 23 2 2008 JUL 13 0717 8.04 38 45.02 122 43.98 1.40 51 .06 .1 .3 2.2D 21 2 2008 JUL 13 0753 11.56 38 48.91 122 47.92 1.91 57 .09 .1 .2 2.1D 23 1 2008 JUL 13 0846 51.33 37 32.65 118 46.97 9.36 42 .04 .2 .5 2.2D 87 7 2008 JUL 13 1748 7.77 36 43.47 121 23.22 7.29 65 .08 .1 .3 2.1D 35 4 2008 JUL 13 1946 26.87 36 55.46 121 34.44 5.17 77 .11 .1 .3 2.8D 30 4 2008 JUL 14 0501 29.27 40 20.98 124 15.88 32.35 13 .09 .7 1.0 2.1D 138 12 2008 JUL 14 1011 14.14 39 26.30 123 6.30 5.03 18 .06 .2 1.2 2.0D 104 15 2008 JUL 14 1315 24.55 38 46.98 122 44.61 0.62 50 .05 .1 .2 2.0D 37 1 2008 JUL 15 1909 20.20 35 59.26 120 33.00 5.03 67 .12 .2 .2 2.1D 46 1 2008 JUL 15 1943 14.84 36 2.15 120 35.74 5.23 71 .11 .2 .3 2.2D 45 4
