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, 2 miles NE of Berkeley, CA at 12:58 PM UTC Thursday, 08 17, 2006 (05:58 AM PDT Thursday, Aug 17, 2006).
The largest event to occur this week in this region was a microearthquake of magnitude 3.0, 2 miles NE of Berkeley, CA at 12:58 PM UTC Thursday, 08 17, 2006 (05:58 AM PDT Thursday, Aug 17, 2006).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 8 miles WSW of Toms Place, CA at 05:23 PM UTC Sunday, 08 20, 2006 (10:23 AM PDT Sunday, Aug 20, 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 AUG 17 0218 44.05 36 35.31 121 11.74 8.51 31 .05 .2 .5 PIN 2.0D 35 2 NN 2006 AUG 17 0544 6.22 36 47.43 121 31.84 10.86 75 .13 .2 .4 SJB 2.9D 44 4 NN 2006 AUG 17 1258 20.17 37 53.33 122 14.61 7.26117 .16 .1 .2 HAY 3.0D 35 2 AW 2006 AUG 18 2202 23.61 39 39.46 122 1.27 20.11 12 .07 .3 .7 SAC 2.1D 90 32 WW 2006 AUG 18 2246 57.72 35 56.98 120 29.86 14.25 51 .08 .2 .3 MID 2.5D 36 1 KK 2006 AUG 19 0646 8.13 38 48.92 122 49.02 3.71 30 .04 .2 .6 GEY 2.3D 38 2 AA 2006 AUG 19 1411 41.82 38 48.45 122 47.49 2.09 25 .05 .2 .9 GEY 2.4D 42 7 AA 2006 AUG 19 1646 23.07 36 21.33 120 25.81 5.92 48 .20 .6 2.1 COA 2.2D 105 35 KN 2006 AUG 19 1723 5.01 36 21.63 120 24.99 10.19 29 .17 .6 .6 COA 2.0D 156 5 AA 2006 AUG 20 0110 30.08 37 31.19 118 49.27 14.34 42 .06 .3 .6 MOR 2.2D 99 5 QQ 2006 AUG 20 1723 2.80 37 31.02 118 49.44 4.24 41 .07 .2 .6 MOR 2.4D 100 5 II 2006 AUG 20 2216 31.15 36 36.39 121 12.96 9.28 47 .06 .2 .4 PIN 2.3D 28 4 NN 2006 AUG 21 1620 55.66 36 30.95 121 5.89 5.71 47 .06 .1 .4 PIN 2.5D 47 2 NN 2006 AUG 21 1850 20.42 38 47.54 122 44.48 2.82 21 .05 .2 .6 GEY 2.0D 44 3 AA 2006 AUG 22 0539 21.03 36 17.10 119 42.94 27.25 24 .11 1.211.9 JQN - 2.2D 195 52 KK 2006 AUG 22 0903 18.45 38 50.14 122 47.97 2.05 16 .03 .2 1.2 GEY 2.0D 63 3 WW 2006 AUG 22 0904 43.36 38 54.31 122 34.92 2.04 10 .10 .4 9.7 BAR - 2.1D 78 12 WW 2006 AUG 22 1133 32.40 38 49.61 122 47.72 4.35 41 .05 .2 .3 GEY 2.6D 44 2 AA 2006 AUG 22 1310 59.13 37 29.54 118 44.57 11.95 38 .07 .3 .6 WCN 2.1D 106 2 II 2006 AUG 23 0100 28.95 38 47.45 122 48.33 3.66 30 .06 .2 .5 GEY 2.1D 39 2 WW 2006 AUG 23 1414 1.00 37 32.80 118 48.95 1.31 15 .06 .4 .6 MOR 2.1D 153 5 WW 2006 AUG 23 1629 52.70 37 57.49 121 14.50 12.89 11 .03 .5 1.2 JQN 2.1D 150 38 WW
