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@usgs.gov
The report no longer includes maps showing earthquakes for the entire US or world. Those maps are now available from the U.S.G.S. National Earthquake Information Center. 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 contained on the real-time earthquake web page. 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 3.3, 1 miles WNW of Concord, CA at 12:22 PM UTC Friday, 04 14, 2000 (05:22 AM PDT Friday, Apr 14, 2000).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.3, 1 miles WNW of Concord, CA at 12:22 PM UTC Friday, 04 14, 2000 (05:22 AM PDT Friday, Apr 14, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.5, 9 miles SE of Mammoth Lakes, CA at 03:43 PM UTC Sunday, 04 16, 2000 (08:43 AM PDT Sunday, Apr 16, 2000).
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 2000 APR 14 0721 41.64 38 47.02 122 45.51 3.79 38 .07 .1 .4 GEY 2.4D 37 4 NN 2000 APR 14 0757 40.84 37 24.79 121 10.32 4.87 69 .15 .2 .7 JQN 2.0D 61 14 NN 2000 APR 14 1134 31.49 36 35.78 121 11.98 7.03 58 .06 .1 .3 PIN 2.4D 35 3 NN 2000 APR 14 1222 31.77 37 58.98 122 2.60 15.76 69 .15 .2 .3 CON 3.3D 70 6 NN 2000 APR 14 1504 9.26 37 40.01 119 24.70 15.63 43 .08 .3 .9 KAI 2.2D 64 30 NN 2000 APR 14 1630 36.25 37 17.39 121 40.17 3.77 63 .06 .1 .2 SFL 2.1D 43 4 NN 2000 APR 14 1749 25.62 37 36.23 121 58.25 9.89 81 .12 .2 .3 HAY 3.0D 29 1 NN 2000 APR 14 1901 18.74 36 1.20 119 53.35 0.29 48 .34 .5 6.4 COA # 2.1D 54 40 NN 2000 APR 14 1929 8.07 35 59.82 119 52.22 6.23 35 .15 .4 1.6 COA 2.0D 125 40 NN 2000 APR 15 0858 15.21 36 38.21 121 14.95 6.45 42 .05 .2 .5 STN 2.1D 40 4 WW 2000 APR 15 1046 57.34 36 28.41 121 2.69 2.14 27 .07 .2 .6 BIT 2.5D 96 5 WW 2000 APR 15 1155 57.10 36 38.22 121 14.95 6.43 42 .05 .1 .4 STN 2.3D 66 4 WW 2000 APR 15 1216 54.22 37 29.15 118 50.24 3.49 26 .05 .3 .8 MOR 2.2D 126 8 WW 2000 APR 15 1306 56.25 36 11.72 120 45.87 8.64 49 .15 .2 .5 BIT 2.7D 68 4 WW 2000 APR 15 1338 5.61 37 32.26 118 51.98 9.62 30 .06 .3 .6 MOR 2.0D 110 7 WW 2000 APR 16 0049 51.67 36 11.41 120 15.71 10.83 39 .15 .2 .5 COA 2.9D 69 10 WW 2000 APR 16 0737 47.49 38 48.99 122 50.41 1.67 28 .05 .2 .5 GEY 2.3D 36 4 WW 2000 APR 16 0936 21.90 39 24.11 123 4.39 2.01 18 .09 .2 4.0 BAR 2.3D 54 16 WW 2000 APR 16 1543 21.14 37 32.44 118 51.89 8.86 32 .06 .3 .6 MOR 2.5D 106 6 WW 2000 APR 16 1625 55.78 39 24.09 123 4.43 1.36 11 .10 .3 9.4 BAR - 2.3D 74 16 WW 2000 APR 16 1905 46.01 36 2.23 121 1.32 6.86 40 .05 .2 .6 ROB 2.4D 57 12 WW 2000 APR 16 2303 52.20 38 20.08 122 12.05 5.92 31 .23 .4 1.1 GVL 2.4D 97 6 WW 2000 APR 17 0330 57.40 40 25.07 124 22.90 20.52 16 .10 1.0 .3 MEN 3.2D 232 8 WW 2000 APR 17 1253 13.32 38 49.45 122 48.15 3.77 19 .04 .2 .5 GEY 2.0D 48 2 WW 2000 APR 18 0102 8.09 38 48.76 122 48.03 1.84 25 .07 .2 .2 GEY 2.5D 42 1 WW 2000 APR 18 0112 36.41 37 23.34 121 44.37 9.18 53 .03 .1 .5 ALU 2.2D 42 4 WW 2000 APR 18 0149 35.34 35 42.36 121 24.41 1.25 9 .31 3.9 8.4 SSM # 2.1D 230 21 WW 2000 APR 18 2202 4.04 38 45.79 122 44.24 2.41 20 .05 .2 .3 GEY 2.3D 43 2 WW 2000 APR 19 0829 23.14 37 9.47 121 33.73 2.99 59 .07 .1 .4 CYN 2.3D 65 6 WW
