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 an earthquake of magnitude 4.6, 10 miles SE of Mammoth Lakes, CA at 07:23 AM UTC Tuesday, 06 12, 2007 (12:23 AM PDT Tuesday, Jun 12, 2007).
The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 13 miles W of Boulder Creek, CA at 03:40 PM UTC Monday, 06 11, 2007 (08:40 AM PDT Monday, Jun 11, 2007).
The largest event to occur this week in this region was an earthquake of magnitude 4.6, 10 miles SE of Mammoth Lakes, CA at 07:23 AM UTC Tuesday, 06 12, 2007 (12:23 AM PDT Tuesday, Jun 12, 2007).
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 2007 JUN 6 0120 0.78 36 42.19 121 17.71 6.25 50 .08 .1 .4 2.5D 42 4 2007 JUN 6 0145 31.32 36 42.18 121 17.73 6.21 49 .08 .1 .4 2.2D 54 4 2007 JUN 6 0501 18.09 35 44.38 121 19.21 7.79 51 .06 .3 .3 2.5D 181 6 2007 JUN 6 0555 42.23 39 24.47 122 55.64 6.47 38 .11 .2 .7 2.1D 34 10 2007 JUN 6 1248 59.71 36 32.66 121 8.08 5.58 55 .06 .1 .3 2.2D 57 6 2007 JUN 6 1709 27.19 37 25.15 118 31.17 8.87 39 .10 .2 1.0 2.2D 82 14 2007 JUN 7 1955 32.76 40 11.23 122 53.75 43.94 26 .18 .5 1.4 2.3D 63 9 2007 JUN 7 2048 25.69 40 9.69 122 51.10 45.77 32 .12 .4 .6 2.5D 54 6 2007 JUN 7 2201 12.66 39 29.74 123 6.93 4.00 31 .05 .2 .8 2.3D 43 10 2007 JUN 8 0449 2.22 36 33.05 121 8.39 3.05 65 .06 .1 .3 2.4D 37 5 2007 JUN 8 1217 37.05 38 49.64 122 48.03 2.33 30 .10 .2 .7 2.0D 45 2 2007 JUN 8 1431 7.20 36 33.13 121 8.57 2.80 44 .06 .1 .4 2.1D 52 5 2007 JUN 8 1454 21.09 38 48.07 122 48.92 4.25 42 .04 .1 .3 2.2D 40 2 2007 JUN 8 2004 0.69 36 25.74 120 59.70 1.80 53 .10 .2 .9 2.5D 77 12 2007 JUN 8 2321 14.31 38 44.72 122 43.10 0.02 15 .10 .4 .6 2.2D 55 3 2007 JUN 9 0346 2.18 38 49.42 122 49.73 2.88 27 .06 .2 .4 2.1D 57 3 2007 JUN 9 1054 39.48 36 2.86 120 7.40 8.62 80 .17 .3 .6 2.2D 127 23 2007 JUN 10 0145 43.66 38 48.40 122 48.51 1.75 20 .02 .2 1.0 2.3D 43 1 2007 JUN 10 1314 45.96 38 49.65 122 48.34 1.46 25 .04 .2 .9 2.1D 44 2 2007 JUN 10 1514 59.25 38 45.03 122 41.94 2.35 18 .05 .2 .6 2.0D 63 3 2007 JUN 11 0030 27.03 38 48.60 122 47.48 4.28 13 .03 .2 .6 2.2D 59 0 2007 JUN 11 0030 27.05 38 48.51 122 47.62 3.95 24 .08 .2 .4 2.1D 56 0 2007 JUN 11 0453 57.91 39 3.30 123 4.12 6.44 16 .06 .2 .5 2.1D 89 5 2007 JUN 11 0718 11.32 38 37.98 122 42.22 7.41 47 .11 .2 .4 2.2D 77 8 2007 JUN 11 1243 4.62 40 17.31 121 21.72 5.41 16 .08 .5 2.0 2.1D 82 13 2007 JUN 11 1243 4.62 40 17.35 121 21.75 8.06 17 .09 .5 1.3 2.1D 65 13 2007 JUN 11 1540 50.36 37 6.10 122 20.87 12.38 57 .18 .7 .6 2.2D 204 11 2007 JUN 11 1743 41.25 39 9.76 123 13.64 0.26 17 .04 .3 1.1 2.1D 104 8 2007 JUN 11 1936 4.47 37 38.26 119 25.59 0.06 45 .16 .2 2.2 2.1D 32 31 2007 JUN 12 0722 36.08 37 32.53 118 52.06 9.75 42 .05 .2 .5 3.6W 63 6 2007 JUN 12 0723 43.15 37 32.25 118 51.84 10.72 44 .12 .3 .5 4.6W 71 7 2007 JUN 12 0727 41.42 37 32.31 118 51.98 8.73 37 .04 .2 .4 2.3D 104 7 2007 JUN 12 0727 41.43 37 32.31 118 51.88 8.64 30 .05 .3 .4 2.4D 64 7 2007 JUN 12 0733 36.84 37 32.37 118 51.87 9.01 50 .05 .2 .4 3.1L 63 6 2007 JUN 12 0734 15.73 37 32.15 118 52.11 8.04 14 .04 .6 1.2 2.2D 188 7 2007 JUN 12 0811 16.89 37 32.69 118 52.33 9.12 49 .05 .2 .4 3.0D 63 6 2007 JUN 12 0814 50.85 37 32.71 118 51.96 7.92 49 .06 .2 .4 2.9L 62 6 2007 JUN 12 0819 13.18 37 32.37 118 51.94 8.71 46 .04 .2 .4 2.5D 63 6 2007 JUN 12 0839 10.77 37 32.43 118 51.95 8.68 35 .04 .2 .5 2.7L 97 6 2007 JUN 12 0841 44.17 37 32.40 118 52.01 8.54 40 .05 .2 .5 2.2D 97 6 2007 JUN 12 0946 22.36 38 33.61 122 28.07 0.45 27 .38 .6 5.7 2.2D 40 10 2007 JUN 12 1033 2.62 37 32.92 118 52.63 8.84 38 .05 .2 .5 2.2D 95 6 2007 JUN 12 1059 30.53 37 32.83 118 52.56 9.17 46 .04 .2 .4 2.6D 63 6 2007 JUN 12 1233 6.30 37 32.76 118 52.35 10.03 47 .06 .2 .4 2.9L 63 6 2007 JUN 12 1417 32.85 37 32.19 118 51.75 9.64 36 .04 .2 .6 2.1D 98 7 ---ORIGIN TIME (UT)--- -LAT N-- --LON W-- DEPTH N RMS ERH ERZ LOC PREF AZ MIN S. PAGE 2 YEAR MON DA HRMN SEC DEG MIN DEG MIN KM RD SEC KM KM REMKS MAG GAP DS PF 2007 JUN 12 1511 10.41 37 33.03 118 52.45 7.68 48 .06 .2 .4 3.5L 62 6 2007 JUN 12 1520 30.27 35 42.50 121 3.10 7.17 40 .10 .2 .7 2.2D 55 10 2007 JUN 12 1901 7.77 36 14.19 120 48.18 9.32 45 .14 .3 .5 2.2D 73 2 2007 JUN 12 1943 34.31 37 32.38 118 52.03 8.16 37 .06 .3 .6 2.3D 97 7 2007 JUN 12 2054 1.15 37 32.40 118 51.95 8.78 36 .05 .3 .6 2.3D 97 6
