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 3.6, 15 miles NNW of San Simeon, CA at 01:38 PM UTC Thursday, 08 28, 2008 (06:38 AM PDT Thursday, Aug 28, 2008).
The largest event to occur this week in this region was a microearthquake of magnitude 2.8, 1 miles WNW of Concord, CA at 04:22 AM UTC Friday, 08 29, 2008 (09:22 PM PDT Thursday, Aug 28, 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 AUG 27 0258 21.17 38 48.66 122 47.58 4.00 46 .06 .2 .2 2.1D 40 0 2008 AUG 27 2100 13.16 38 45.12 122 43.97 1.23 44 .09 .2 .2 2.0D 26 1 2008 AUG 28 1313 31.64 36 43.09 121 22.17 8.29 69 .08 .1 .2 2.9D 36 3 2008 AUG 28 1313 52.36 36 41.40 121 24.70 0.08 23 .10 .3 .6 2.5D 53 6 2008 AUG 28 1338 3.94 35 49.81 121 18.66 10.97 59 .10 .2 .4 3.6L 161 9 2008 AUG 28 1441 3.80 39 13.81 123 12.24 1.42 19 .06 .2 .8 2.2D 74 9 2008 AUG 29 0422 38.71 37 59.32 122 3.14 17.67 84 .14 .2 .3 2.8D 67 5 2008 AUG 29 2059 44.84 37 23.65 118 40.58 14.20 37 .04 .3 .6 2.1D 75 3 2008 AUG 30 0552 25.03 37 9.52 118 4.55 5.94 25 .12 .4 1.1 2.0D 219 18 2008 AUG 30 1808 13.78 36 33.82 121 9.33 3.17 48 .06 .1 .3 2.4D 43 3
