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 2.8, 7 miles NNW of San Ardo, CA at 12:54 PM UTC Saturday, 10 07, 2006 (05:54 AM PDT Saturday, Oct 07, 2006).
The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 9 miles ENE of San Jose City Hall, CA at 10:58 PM UTC Friday, 10 06, 2006 (03:58 PM PDT Friday, Oct 06, 2006).
The largest event to occur this week in this region was a microearthquake of magnitude 2.5, 9 miles WSW of Toms Place, CA at 06:34 PM UTC Thursday, 10 05, 2006 (11:34 AM PDT Thursday, Oct 05, 2006).
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 2006 OCT 5 0412 1.66 38 48.15 122 48.89 2.59 51 .08 .1 .2 GEY 2.6D 29 1 WW 2006 OCT 5 1211 0.14 39 28.06 123 6.51 3.79 10 .02 .2 1.5 BAR 2.1D 92 12 WW 2006 OCT 5 1715 30.57 38 48.68 122 47.51 2.82 22 .05 .2 .3 GEY 2.0D 86 0 WW 2006 OCT 5 1834 15.86 37 31.24 118 49.74 4.52 39 .05 .2 .7 MOR 2.5D 100 8 WW 2006 OCT 6 1304 37.59 38 44.87 122 27.28 5.54 31 .18 .3 1.0 GVL 2.3D 45 6 WW 2006 OCT 6 1620 30.32 40 24.06 122 7.69 2.88 9 .09 1.510.8 SHA - 2.2D 196 44 WW 2006 OCT 6 2258 22.00 37 22.25 121 43.97 6.14 70 .05 .1 .3 ALU 2.2D 29 3 AN 2006 OCT 7 0930 35.74 39 27.72 123 6.60 4.07 18 .05 .2 1.0 BAR 2.3D 61 13 WW 2006 OCT 7 1254 20.94 36 7.06 120 56.92 11.38 72 .09 .1 .5 ROB 2.8D 38 12 AA 2006 OCT 7 1846 51.30 35 43.11 121 5.26 6.42 38 .04 .2 .4 SSM 2.4D 84 6 WW 2006 OCT 8 0758 7.78 38 46.74 122 43.14 1.29 29 .15 .2 .3 GEY 2.5D 44 1 WW 2006 OCT 8 1657 14.44 38 46.22 122 44.73 0.92 32 .08 .2 .4 GEY 2.3D 38 2 WW 2006 OCT 9 0130 12.89 38 47.59 122 45.52 1.58 44 .08 .1 .2 GEY 2.3D 44 1 WW 2006 OCT 9 0452 13.81 37 32.55 118 49.08 4.54 32 .05 .2 .5 MOR 2.0D 138 4 WW 2006 OCT 9 0604 33.15 38 48.20 122 48.22 1.03 44 .09 .2 .3 GEY 2.6D 29 2 WW 2006 OCT 11 0043 11.58 40 32.75 122 19.41 13.42 17 .23 .8 1.1 SHA 2.4D 60 19 WW 2006 OCT 11 1622 42.91 37 33.46 118 27.34 5.88 35 .07 .2 .5 CHV 2.4D 66 2 WW
