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 microearthquake of magnitude 3.0, 5 miles SE of Los Banos, CA at 03:24 AM UTC Monday, 07 30, 2007 (08:24 PM PDT Sunday, Jul 29, 2007).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 6 miles E of Watsonville, CA at 12:58 PM UTC Saturday, 07 28, 2007 (05:58 AM PDT Saturday, Jul 28, 2007).
The largest event to occur this week in this region was a microearthquake of magnitude 2.9, 9 miles WSW of Toms Place, CA at 02:24 PM UTC Thursday, 07 26, 2007 (07:24 AM PDT Thursday, Jul 26, 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 JUL 26 0228 46.13 38 48.73 122 48.18 2.95 42 .11 .2 .3 2.5D 40 1 2007 JUL 26 0338 41.15 39 21.12 123 13.84 0.02 36 .13 .2 1.1 2.3D 40 16 2007 JUL 26 1001 14.68 38 49.62 122 47.76 2.16 45 .07 .1 .2 2.1D 26 1 2007 JUL 26 1041 22.41 36 1.57 120 36.15 5.79 63 .13 .2 .3 2.1D 41 5 2007 JUL 26 1424 22.65 37 30.67 118 49.30 4.28 46 .07 .2 .5 2.9D 63 5 2007 JUL 26 2139 35.26 35 59.24 119 57.96 24.99 51 .21 .4 .6 2.8D 162 14 2007 JUL 27 1520 43.67 39 26.12 123 6.46 4.47 33 .08 .2 .9 2.1D 41 16 2007 JUL 27 1939 25.32 35 11.42 120 38.58 8.90 57 .05 .1 .2 2.1D 82 3 2007 JUL 28 0024 19.08 37 31.20 119 23.55 17.62 50 .11 .2 .9 2.7D 39 25 2007 JUL 28 0949 34.11 36 50.80 121 34.50 4.99 70 .11 .2 .3 2.3D 44 2 2007 JUL 28 1258 38.97 36 54.50 121 39.29 10.49 82 .07 .1 .3 2.4D 33 3 2007 JUL 28 1628 4.34 35 40.15 121 6.95 5.56 62 .08 .1 .3 2.2D 123 4 2007 JUL 28 1842 40.80 39 20.87 123 14.03 8.27 32 .04 .1 .7 2.1D 40 17 2007 JUL 29 0225 37.05 37 32.25 118 48.83 7.00 45 .05 .2 .4 2.2D 93 4 2007 JUL 29 1023 22.61 38 48.68 122 47.12 1.76 39 .06 .1 .2 2.0D 35 0 2007 JUL 29 1247 12.07 37 33.11 118 27.84 8.35 36 .05 .2 .4 2.2D 40 2 2007 JUL 29 1555 32.15 38 46.35 122 44.56 2.81 65 .07 .1 .2 2.3D 33 1 2007 JUL 29 2147 2.54 38 44.63 122 42.87 1.49 45 .08 .1 .2 2.2D 43 0 2007 JUL 30 0324 31.86 37 0.48 120 46.46 1.30 74 .26 .3 2.1 3.0L 57 19 2007 JUL 30 0913 7.24 38 48.84 122 47.10 2.04 56 .08 .1 .2 2.2D 35 0 2007 JUL 31 1325 22.78 38 50.25 122 50.53 1.39 56 .06 .1 .2 2.5D 35 1
