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 15 miles NNE of Pinnacles, CA at 09:58 PM UTC Friday, Feb 27, 1998 (01:58 PM PST Friday, Feb 27, 1998).
The largest event to occur this week in this region was a microearthquake of magnitude 3.0 3 miles WSW of San Juan Bautista, CA at 06:01 AM UTC Wednesday, Mar 04, 1998 (10:01 PM PST Tuesday, Mar 03, 1998).
The largest event to occur this week in this region was a microearthquake of magnitude 3.0 3 miles ESE of Mammoth Lakes, CA at 11:36 PM UTC Monday, Mar 02, 1998 (03:36 PM PST Monday, Mar 02, 1998).
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 N RMS ERH ERZ LOC PREF YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 98 FEB 26 52 43.28 38 46.13 122 43.74 3.85 38 1 .08 .1 .3 GEY 2.5D 98 FEB 26 130 12.09 38 48.55 122 48.75 1.28 39 .05 .1 .2 GEY 2.5D 98 FEB 26 536 21.58 38 47.12 122 46.22 2.64 41 .06 .1 .3 GEY 3.0D 98 FEB 26 2248 16.32 36 33.37 121 9.08 6.78 30 .07 .2 .4 PIN 2.1D 98 FEB 27 114 52.86 37 13.77 118 19.10 13.75 28 .05 .7 .9 OWV 2.1D 98 FEB 27 154 14.42 39 2.44 123 7.40 5.52 34 1 .08 .1 .6 MAA 2.3D 98 FEB 27 732 59.90 36 23.12 120 57.79 6.94 43 .06 .1 .4 BIT 2.2D 98 FEB 27 2158 23.40 36 42.99 121 0.67 5.74 90 4 .20 .2 1.1 ORT 3.2D 98 FEB 27 2226 57.72 37 37.42 118 51.01 4.44 29 1 .08 .3 .4 SMO 2.3D 98 FEB 27 2304 33.94 37 15.07 118 18.65 14.55 31 .06 .6 .7 OWV 2.5D 98 FEB 28 9 40.69 36 42.90 121 0.75 5.61 65 1 .19 .2 1.7 ORT 2.3D 98 FEB 28 710 33.40 40 33.49 122 10.23 10.01 8 1 .35 2.324.1 SHA - 2.4D 98 FEB 28 833 11.21 37 38.02 118 57.36 8.36 16 .07 .3 .5 SMO 2.1D 98 MAR 1 1849 49.24 38 45.27 122 43.88 2.51 32 .06 .1 .3 GEY 2.2D 98 MAR 1 2321 41.34 36 27.99 121 2.69 7.29 51 .05 .1 .3 BIT 2.2D 98 MAR 2 1356 42.69 38 46.48 122 44.85 1.72 25 1 .05 .2 .4 GEY 2.2D 98 MAR 2 1915 32.81 38 47.65 122 46.64 1.91 36 .06 .1 .3 GEY 2.8D 98 MAR 2 2319 47.70 37 38.31 118 54.88 7.84 25 .07 .2 .4 SMO 2.7D 98 MAR 2 2325 15.15 37 38.16 118 55.02 7.74 23 .07 .3 .5 SMO 2.2D 98 MAR 2 2325 53.13 37 38.19 118 55.07 8.35 19 .06 .3 .6 SMO 2.1D 98 MAR 2 2332 14.10 37 38.00 118 55.30 7.85 26 .08 .3 .4 SMO 2.9D 98 MAR 2 2333 13.82 37 37.67 118 54.93 8.50 15 .06 .4 .5 SMO 2.5D 98 MAR 2 2336 5.88 37 38.14 118 55.05 8.15 28 .08 .3 .4 SMO 3.0D 98 MAR 2 2340 42.05 37 38.33 118 54.98 7.84 17 .06 .3 .6 SMO 2.3D 98 MAR 2 2341 25.75 37 38.07 118 55.06 7.02 19 .14 .4 .6 SMO 2.2D 98 MAR 2 2342 50.11 37 38.05 118 54.44 19.78 9 .24 3.011.5 SMO 2.5D 98 MAR 2 2348 19.99 37 38.23 118 55.09 8.25 17 .05 .3 .5 SMO 2.3D 98 MAR 2 2358 5.66 37 38.37 118 55.23 7.95 26 .07 .3 .5 SMO 2.2D 98 MAR 2 2359 9.43 37 38.28 118 55.38 8.58 27 .07 .3 .4 SMO 2.6D 98 MAR 3 2 0.80 37 38.33 118 54.98 7.37 23 .07 .3 .4 SMO 2.6D 98 MAR 3 5 4.07 37 38.30 118 55.19 7.90 30 .07 .3 .4 SMO 2.9D 98 MAR 3 36 38.59 37 38.70 118 55.35 8.74 12 .03 .5 .9 SMO 2.2D 98 MAR 3 344 56.42 38 48.72 122 48.29 2.38 21 .06 .2 .4 GEY 2.3D 98 MAR 4 428 30.91 37 14.26 118 22.80 8.25 18 .06 1.0 1.6 KAI 2.1D 98 MAR 4 601 0.88 36 50.61 121 34.39 5.61 68 .14 .2 .3 SJB 2.8L 98 MAR 4 601 37.43 36 50.09 121 35.78 6.44 21 .27 .7 1.9 SJB 3.0L 98 MAR 4 854 2.92 38 50.32 122 46.28 1.96 26 .07 .2 .5 GEY 2.2D 98 MAR 4 854 29.55 38 50.47 122 45.98 1.57 16 .04 .6 .7 GEY 2.4D 98 MAR 4 1144 1.32 36 56.26 121 41.08 12.22 70 .08 .2 .3 SJB 2.9D 98 MAR 4 1247 51.53 36 56.31 121 41.15 12.49 71 .08 .2 .3 SJB 3.0L 98 MAR 4 1326 20.44 40 37.64 124 16.64 18.60 9 .07 1.0 .8 EUR 2.1D 98 MAR 4 1512 23.69 38 49.52 122 47.75 4.08 22 .04 .2 .4 GEY 2.1D 98 MAR 4 1818 31.66 37 38.99 118 54.22 1.80 12 .07 .4 .5 SMO 2.3D 98 MAR 4 2046 47.30 38 41.08 123 9.64 3.97 28 .11 .2 1.2 MAR 2.3D 98 MAR 4 2137 6.85 37 32.64 118 44.38 3.98 27 .05 .3 .6 WCN 2.5D --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ LOC PREF YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 98 MAR 4 2332 10.69 38 50.69 122 46.27 2.01 19 .05 .2 .7 GEY 2.1D
