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 moderate earthquake of magnitude 5.8, 49 miles W of Punta Gorda, CA at 03:19 PM UTC Thursday, 03 16, 2000 (07:19 AM PST Thursday, Mar 16, 2000). The earthquake was felt in Humboldt and Mendocino counties but no there have been no reports of damage. It was followed by a M3.8 event in much the same area at 5:05 AM UTC Saturday, 03 18, 2000 (21:05 PM PST Friday, Mar 17, 2000). A M3.8 earthquake also occurred about 17 miles north of Coalinga early Thursday afternoon at 1:42 PM PST, Mar 16, 2000 (9:42 PM UTC Thursday, Mar 16, 2000).
The largest event to occur this week in this region was a minor earthquake of magnitude 3.3, 2 miles SSW of San Juan Bautista, CA at 03:41 PM UTC Wednesday, 03 22, 2000 (07:41 AM PST Wednesday, Mar 22, 2000).
The largest event to occur this week in this region was a microearthquake of magnitude 2.4, 8 miles WSW of Toms Place, CA at 07:54 AM UTC Friday, 03 17, 2000 (11:54 PM PST Thursday, Mar 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 MAR 16 0939 35.78 38 51.22 122 47.43 1.96 19 .05 .2 .7 GEY 2.2D 77 5 WW 2000 MAR 16 1323 16.42 38 49.49 122 46.49 2.12 19 .06 .2 .5 GEY 2.1D 59 3 WW 2000 MAR 16 1519 55.81 40 22.82 125 16.84 5.00151 .31 1.5 9.3 MEN # 4.8D 230 81 NN 2000 MAR 16 2142 36.12 36 22.70 120 23.67 7.68 47 .13 .2 .3 COA 3.8D 105 5 NN 2000 MAR 17 0714 46.91 40 41.03 124 32.41 24.17 27 .05 .5 1.0 EUR 2.7D 233 29 NN 2000 MAR 17 0754 30.01 37 31.98 118 48.99 6.02 35 .05 .2 .6 MOR 2.4D 109 6 NN 2000 MAR 18 0505 41.07 40 25.11 125 6.52 8.72 80 .12 .7 1.6 MEN 3.7D 231 66 NN 2000 MAR 18 1116 30.63 36 41.25 121 19.11 5.77 54 .04 .1 .2 STN 2.2D 39 3 NN 2000 MAR 19 0105 26.05 39 19.97 122 49.08 8.60 32 .03 .1 .6 BAR 2.1D 84 19 NN 2000 MAR 19 0213 3.90 37 28.24 118 47.42 6.08 36 .06 .3 .6 MOR 2.2D 125 6 NN 2000 MAR 19 0824 25.30 37 29.10 118 50.31 3.38 36 .05 .2 .7 MOR 2.2D 121 8 NN 2000 MAR 20 0816 52.88 40 54.72 122 23.63 19.61 25 .14 .3 1.3 SHA 2.7D 89 24 NN 2000 MAR 20 2311 9.29 38 48.01 122 48.79 1.74 31 .03 .1 .4 GEY 2.4D 37 2 NN 2000 MAR 20 2317 32.43 39 29.81 122 56.84 10.33 26 .06 .2 .3 BAR 2.1D 48 1 NN 2000 MAR 22 1454 59.92 38 47.10 122 46.36 4.02 19 .04 .2 .5 GEY 2.1D 40 3 WW 2000 MAR 22 1541 20.37 36 48.75 121 32.75 7.96 75 .12 .2 .3 SJB 3.3L 34 3 WW
