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 3.9, 6 miles NE of American Canyon, CA at 02:29 AM UTC Wednesday, 06 04, 2008 (07:29 PM PDT Tuesday, Jun 03, 2008).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.9, 6 miles NE of American Canyon, CA at 02:29 AM UTC Wednesday, 06 04, 2008 (07:29 PM PDT Tuesday, Jun 03, 2008).
The largest event to occur this week in this region was a microearthquake of magnitude 1.8, 8 miles WSW of Toms Place, CA at 09:54 PM UTC Sunday, 06 08, 2008 (02:54 PM PDT Sunday, Jun 08, 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 JUN 4 0040 20.04 35 50.44 120 23.17 4.73 75 .10 .1 .2 2.4D 56 1 2008 JUN 4 0229 4.15 38 14.51 122 11.03 10.31105 .23 .3 .4 3.9W 97 5 2008 JUN 4 0606 36.08 35 43.29 121 2.53 5.93 67 .10 .1 .3 2.5D 47 7 2008 JUN 4 2228 21.27 40 19.33 121 31.46 10.22 13 .06 .5 1.5 2.1D 132 12 2008 JUN 4 2300 34.02 37 17.18 118 10.50 12.26 46 .07 .4 .6 2.9D 170 13 2008 JUN 5 1106 8.40 38 48.86 122 49.14 2.94 47 .07 .2 .2 2.2D 38 1 2008 JUN 5 1159 34.62 37 22.60 118 36.67 14.65 38 .05 .3 .6 2.0D 124 5 2008 JUN 5 1445 8.42 38 49.16 122 48.41 3.28 29 .09 .2 .3 2.5D 43 1 2008 JUN 5 1448 18.23 40 19.17 121 31.80 8.74 13 .06 .6 1.9 2.1D 132 12 2008 JUN 5 2159 14.86 40 13.00 123 8.49 37.78 24 .08 .3 1.0 2.2D 54 24 2008 JUN 5 2353 57.87 38 48.42 122 47.46 3.48 19 .05 .3 .6 2.5D 49 0 2008 JUN 6 0851 51.70 37 49.06 122 4.34 7.94120 .18 .2 .3 3.0L 35 8 2008 JUN 6 0902 53.89 37 48.95 122 4.50 7.86167 .19 .1 .3 3.5W 33 9 2008 JUN 6 0950 40.16 38 50.36 122 49.88 2.28 29 .07 .2 .2 2.0D 87 0 2008 JUN 6 1619 34.77 36 24.85 120 59.51 7.87 75 .09 .1 .4 2.6D 66 3 2008 JUN 7 0430 34.01 35 32.18 120 49.16 6.47 21 .14 .5 1.1 2.1D 141 8 2008 JUN 7 1219 8.10 40 43.54 124 3.39 22.00 15 .10 .5 .4 2.5D 142 10 2008 JUN 7 1356 14.39 37 6.96 118 13.76 11.36 32 .03 .4 .7 2.0D 162 7 2008 JUN 7 1358 50.56 37 49.26 122 4.14 6.59 52 .11 .2 .3 2.0D 35 8 2008 JUN 7 2042 54.43 37 49.25 122 4.07 6.63 58 .12 .2 .4 2.2D 33 8 2008 JUN 7 2155 26.46 37 48.90 122 3.94 7.55 93 .11 .1 .2 2.2D 37 8 2008 JUN 7 2225 51.06 37 49.25 122 3.96 7.55100 .12 .1 .2 2.5D 34 8 2008 JUN 7 2227 28.65 36 55.46 121 1.64 1.33 48 .11 .2 6.7 2.2D 136 12 2008 JUN 7 2317 22.59 40 44.17 124 30.30 14.75 11 .06 .9 .8 2.3D 227 41 2008 JUN 8 1207 4.73 35 38.62 120 55.25 8.44 37 .11 .2 .4 2.0D 51 5 2008 JUN 8 1245 23.81 37 23.30 120 2.56 22.85 40 .35 .5 .5 2.5D 74 19 2008 JUN 8 2014 17.19 38 49.15 122 49.31 1.96 52 .10 .2 .2 2.0D 44 1 2008 JUN 9 1131 35.52 37 48.95 122 4.20 8.47152 .17 .1 .3 3.1L 35 8 2008 JUN 9 2229 11.38 36 32.24 121 7.19 3.43 64 .07 .1 .3 2.3D 44 5 2008 JUN 10 0322 50.20 35 47.23 121 22.23 5.94 54 .08 .3 .2 2.2D 182 6 2008 JUN 10 0525 25.37 38 47.96 122 48.88 3.36 51 .07 .2 .2 2.4D 25 2 2008 JUN 10 0623 40.66 39 18.68 123 15.35 0.02 43 .10 .2 .7 2.3D 92 12 2008 JUN 10 1311 56.67 37 12.60 119 25.76 43.23 25 .14 .5 .6 2.4D 92 16
