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 3.2, 10 miles WNW of Punta Gorda, CA at 12:06 AM UTC Wednesday, 02 23, 2000 (04:06 PM PST Tuesday, Feb 22, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.2, 2 miles W of San Juan Bautista, CA at 09:38 AM UTC Tuesday, 02 22, 2000 (01:38 AM PST Tuesday, Feb 22, 2000).
The largest event to occur this week in this region was an earthquake of magnitude 2.0, 8 miles WSW of Toms Place, CA at 02:59 AM UTC Saturday, 02 19, 2000 (06:59 PM PST Friday, Feb 18, 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 FEB 17 0852 29.93 36 5.28 120 32.76 6.14 32 .08 .4 .3 COA 2.1D 175 5 NN 2000 FEB 17 1724 19.47 36 29.00 120 27.06 9.09 85 .20 .2 1.0 CRV 2.5D 99 35 NN 2000 FEB 18 0423 58.96 39 18.17 122 47.60 11.00 34 .05 .1 .6 BAR 2.1D 77 16 NN 2000 FEB 18 1321 48.53 40 51.25 122 10.11 2.61 33 .21 .213.8 SHA - 3.0D 61 29 NN 2000 FEB 18 1323 39.22 40 51.25 122 10.53 13.49 28 .15 .3 1.6 SHA 2.5D 60 29 NN 2000 FEB 18 1433 30.53 40 50.94 122 11.07 15.16 16 .08 .4 1.4 SHA 2.4D 95 30 NN 2000 FEB 18 1740 34.78 40 50.84 122 11.31 13.09 15 .07 .3 1.5 SHA 2.2D 92 30 NN 2000 FEB 18 1803 56.14 37 3.82 119 21.10 42.81 36 .08 .5 1.0 KAI 2.6D 145 53 NN 2000 FEB 18 1957 6.30 40 36.49 121 53.00 18.68 12 .05 .5 .6 SHA 2.2D 73 7 NN 2000 FEB 19 1408 9.83 36 39.23 121 16.57 7.53 52 .06 .1 .3 STN 2.1D 52 1 NN 2000 FEB 19 1632 15.38 40 58.31 124 1.58 25.88 16 .05 .5 .8 EUR 2.1D 171 21 NN 2000 FEB 20 0401 28.21 36 39.29 121 16.68 7.51 61 .05 .1 .2 STN 2.5D 45 1 NN 2000 FEB 20 2043 16.01 38 45.24 122 55.14 5.47 35 .09 .1 .6 ROG 2.7D 38 8 NN 2000 FEB 21 2204 12.98 41 11.40 121 53.98 19.90 13 .07 .5 1.0 SHA 2.4D 125 17 NN 2000 FEB 22 0036 0.61 40 29.96 122 6.72 17.44 15 .06 .4 .8 SHA 2.3D 141 21 NN 2000 FEB 22 0938 35.02 36 50.74 121 34.22 5.17 47 .11 .2 .3 SJB 2.2D 32 2 NN 2000 FEB 23 0006 40.96 40 18.55 124 32.99 20.49 30 .08 1.1 .4 MEN 3.2L 228 26 WW 2000 FEB 23 0045 39.04 38 56.34 123 7.15 6.70 16 .09 .3 .8 MAA 2.1D 61 6 WW
