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 3.6, 11 miles WSW of Ferndale, CA at 11:14 PM UTC Wednesday, 02 02, 2000 (03:14 PM PST Wednesday, Feb 02, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.3, 8 miles E of Milpitas, CA at 08:18 AM UTC Tuesday, 02 01, 2000 (12:18 AM PST Tuesday, Feb 01, 2000).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.0, 8 miles SE of Mammoth Lakes, CA at 01:05 AM UTC Monday, 01 31, 2000 (05:05 PM PST Sunday, Jan 30, 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 JAN 27 0500 21.92 38 47.52 122 43.62 2.16 20 .07 .2 .4 GEY 2.1D 47 2 WW 2000 JAN 27 0950 3.42 40 48.57 122 41.20 15.21 10 .13 .5 .5 KLA 2.6D 131 17 WW 2000 JAN 27 1147 47.69 39 53.83 123 12.91 9.71 33 .18 .3 .6 BAR 2.9D 30 2 WW 2000 JAN 27 1526 33.85 36 33.18 121 8.89 8.56 33 .06 .2 .4 PIN 2.2D 34 4 WW 2000 JAN 27 1804 41.00 40 46.59 124 20.13 23.03 18 .03 .5 1.1 EUR 2.8D 197 33 WW 2000 JAN 27 2238 2.77 36 35.44 121 19.50 12.90 46 .08 .2 .3 STN 2.1D 34 2 WW 2000 JAN 28 0834 16.11 39 27.86 122 56.11 12.16 23 .06 .2 .9 BAR 2.2D 79 3 WW 2000 JAN 28 1813 44.25 38 50.95 122 49.01 1.24 15 .05 .2 .7 GEY 2.1D 49 5 WW 2000 JAN 28 1943 3.54 40 30.37 123 57.56 19.83 12 .12 .4 .5 EUR 2.5D 95 15 WW 2000 JAN 28 1952 21.58 37 35.32 118 47.88 6.38 27 .06 .3 .5 MOR 2.1D 77 3 WW 2000 JAN 29 1855 44.97 37 33.50 118 48.30 1.61 18 .07 .3 .4 MOR 2.0D 146 4 WW 2000 JAN 30 1720 15.81 38 48.76 122 47.74 4.58 21 .05 .2 .4 GEY 2.0D 39 1 WW 2000 JAN 31 0105 2.82 37 34.89 118 50.94 4.90 35 .07 .2 .4 MOR 3.0D 98 2 WW 2000 JAN 31 0716 7.90 39 39.56 123 39.57 0.04 11 .25 1.1 6.6 PAR # 2.2D 199 7 WW 2000 JAN 31 1138 37.01 38 43.63 122 26.47 6.01 23 .12 .3 1.1 GVL 2.1D 49 9 WW 2000 JAN 31 2226 56.36 38 50.08 122 46.67 0.03 19 .10 .2 .8 GEY # 2.2D 80 3 WW 2000 FEB 1 0226 30.27 38 49.28 122 47.72 0.79 20 .04 .2 .4 GEY 2.4D 54 2 WW 2000 FEB 1 0536 56.57 37 39.61 119 42.55 36.67 22 .06 .2 .9 KAI 2.8D 74 27 WW 2000 FEB 1 0818 37.61 37 25.22 121 45.81 10.23 73 .06 .1 .3 ALU 2.3D 33 5 WW 2000 FEB 1 1432 5.33 37 34.89 118 50.92 4.88 32 .06 .2 .4 MOR 2.2D 98 2 WW 2000 FEB 2 1508 54.11 38 45.20 122 55.09 5.36 38 .10 .2 .6 ROG 2.5D 38 6 WW 2000 FEB 2 2303 23.86 39 12.49 123 27.69 6.61 32 .13 .3 .9 PAR 3.3L 83 14 WW 2000 FEB 2 2314 32.61 40 30.84 124 26.84 23.69 34 .09 .7 .5 EUR 3.6L 223 10 WW
