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 light earthquake of magnitude 4.3, 5 miles NW of Parkfield, CA at 01:54 AM UTC Monday, 11 29, 2004 (05:54 PM PST Sunday, Nov 28, 2004).
The largest event to occur this week in this region was a microearthquake of magnitude 2.6, 7 miles NNE of Yountville, CA at 05:10 PM UTC Sunday, 11 28, 2004 (09:10 AM PST Sunday, Nov 28, 2004).
The largest event to occur this week in this region was an earthquake of magnitude 1.6, 9 miles SSE of Toms Place, CA at 11:52 AM UTC Tuesday, 11 30, 2004 (03:52 AM PST Tuesday, Nov 30, 2004).
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 2004 NOV 25 0652 21.94 36 36.09 121 12.02 5.78 66 .07 .1 .3 PIN 2.9D 34 3 NN 2004 NOV 25 1552 50.97 35 30.71 120 49.21 4.01 11 .08 1.7 7.1 SSM 2.0D 189 17 WW 2004 NOV 25 1904 2.26 35 51.96 120 24.72 5.85 32 .04 .2 .3 GOL 2.0D 91 2 WW 2004 NOV 25 2356 39.85 35 57.15 120 30.43 13.43 36 .08 .2 .3 MID 2.2D 48 1 WW 2004 NOV 26 1826 49.86 35 41.20 121 0.04 7.74 26 .27 1.3 3.2 SSM 2.2D 119 13 WW 2004 NOV 26 2108 42.03 37 20.13 122 11.47 9.17 32 .09 .2 .4 BLM 2.1D 51 1 WW 2004 NOV 26 2202 12.69 35 55.75 120 28.76 5.49 45 .05 .2 .2 MID 2.4D 48 3 WW 2004 NOV 27 0208 18.50 35 42.22 121 2.75 5.68 48 .07 .1 .4 SSM 3.4L 73 10 XX 2004 NOV 27 0519 40.12 35 56.33 120 29.13 10.47 58 .06 .2 .2 MID 3.2L 38 2 XW 2004 NOV 27 1201 33.38 38 25.35 122 13.95 5.08 11 .07 .3 .5 GVL 2.1D 80 3 WW 2004 NOV 27 2054 35.00 38 47.67 122 45.04 2.36 16 .04 .2 .6 GEY 2.1D 62 4 WW 2004 NOV 27 2141 51.91 38 46.19 122 43.82 3.24 30 .07 .2 .4 GEY 2.4D 30 1 WW 2004 NOV 28 0025 49.47 36 37.22 121 13.54 5.06 30 .04 .2 .5 PIN 2.2D 59 6 WW 2004 NOV 28 0349 9.18 38 48.49 122 47.66 4.35 17 .03 .2 .5 GEY 2.1D 38 0 WW 2004 NOV 28 1710 22.38 38 29.77 122 17.66 5.99 56 .16 .3 .6 GVL 2.6D 118 7 WW 2004 NOV 28 2057 37.25 35 39.41 121 2.37 4.77 16 .05 .4 .7 SSM 2.0D 188 11 WW 2004 NOV 29 0154 14.51 35 56.64 120 29.52 10.35 56 .06 .2 .2 MID 4.3L 40 1 WW 2004 NOV 29 0324 26.71 35 40.26 121 3.25 5.13 37 .09 .3 .9 SSM 2.7D 151 17 WW 2004 NOV 29 0325 52.74 35 40.10 121 3.27 5.78 33 .07 .3 .7 SSM 2.4D 119 9 WW 2004 NOV 29 0407 54.57 38 49.44 122 48.41 3.77 20 .04 .2 .5 GEY 2.0D 42 2 WW 2004 NOV 29 0415 34.56 35 40.46 121 2.99 4.47 23 .07 1.4 2.1 SSM 2.1D 174 9 WW 2004 NOV 29 1609 17.20 35 33.23 120 48.62 5.22 54 .09 .2 .8 SSM 2.8D 103 11 WW 2004 NOV 29 1614 12.11 35 56.45 120 29.41 10.81 39 .06 .2 .2 MID 2.2D 47 2 WW 2004 NOV 30 1613 16.36 36 36.09 121 12.11 6.60 59 .06 .1 .3 PIN 3.0D 33 3 WW 2004 NOV 30 1913 21.59 36 37.12 121 13.42 5.13 42 .03 .1 .4 PIN 2.2D 28 6 WW 2004 NOV 30 2008 6.99 38 47.54 122 45.35 2.94 20 .04 .2 .6 GEY 2.0D 43 4 WW 2004 NOV 30 2224 58.12 36 37.20 121 13.50 5.05 39 .04 .1 .4 PIN 2.2D 36 6 WW 2004 DEC 1 0224 38.32 38 46.65 122 43.46 2.34 20 .07 .2 .4 GEY 2.3D 44 1 WW 2004 DEC 1 0627 39.81 38 49.02 122 47.77 2.35 17 .03 .2 .3 GEY 2.0D 39 1 WW 2004 DEC 1 1100 51.14 38 48.88 122 48.94 2.44 17 .03 .2 .7 GEY 2.2D 43 2 WW 2004 DEC 1 1101 42.93 39 18.58 123 0.81 1.02 29 .13 .2 7.8 BAR # 2.7D 45 21 WW 2004 DEC 1 1110 3.74 36 37.03 121 13.46 6.44 52 .04 .1 .4 PIN 2.5D 26 6 WW 2004 DEC 1 1213 21.78 36 37.01 121 13.48 6.33 39 .03 .1 .4 PIN 2.1D 34 6 WW 2004 DEC 1 1314 26.61 37 1.50 121 11.75 4.71 51 .07 .2 .6 ORT 2.2D 56 3 WW 2004 DEC 1 1316 10.29 35 36.91 120 57.12 4.43 25 .20 .8 2.2 SSM 2.2D 102 15 WW 2004 DEC 1 1726 23.10 37 16.43 119 55.79 16.19 19 .21 .5 .6 KAI 2.5D 81 18 WW
