DISCLAIMER -- THIS IS NOT AN EARTHQUAKE PREDICTION OR WARNING! The commentary provided with these map(s) is for INFORMATIONAL USE ONLY, and SHOULD NOT be construed as an earthquake prediction, warning, or advisory. Responsibility for such warnings rests with the Office of Emergency Services of the State of California. PLEASE REMEMBER -- THESE ARE PRELIMINARY DATA Releasing these summaries on a timely basis requires that the data, analysis, and interpretations presented are PRELIMINARY. Of necessity they can only reflect the views of the seismologists who prepared them, and DO NOT carry the endorsement of the U.S.G.S. Thus while every effort is made to ensure that the information is accurate, nothing contained in this report is to be construed as and earthquake prediction, warning, advisory, or official policy statement of any kind, of the U.S. Geological Survey, or the U.S. Government. FOR QUESTIONS CONCERNING THIS REPORT Send e-mail to michael@andreas.wr.usgs.gov or reply to this message. Seismicity Report for Northern California, the Nation, and the World for the week of February 3 - 9, 1994 Data and text prepared by Steve Walter and Barry Hirshorn U.S. Geological Survey 345 Middlefield Rd. MS-977, Menlo Park, CA 94025 Graphics by Quentin Lindh San Francisco Bay Area The Bay area remained quiet for the fourth straight week. During the seven-day period ending at midnight on Wednesday, February 9, 1994 the U.S. Geological Survey office in Menlo Park recorded just nine earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. Four of these were as large as M2. This total compares to 20 earthquakes during the previous seven-day period (Jan. 27 - Feb. 2), two of which were as large as M2. Most of the week's activity occurred to the south near the juncture of the San Andreas and Calaveras faults. The San Andreas itself had only one M2 earthquake, a M2.1 last Thursday afternoon that was located about five miles northwest of San Juan Bautista (#1 in Figure 1). The sole M2 on the Calaveras occurred Monday afternoon: a M2.5 about three miles south of Hollister (#2/1). Except for a M1.7 southeast of San Jose later that day, this was the only activity on the Calaveras during the week. The remaining M2 activity consisted of a pair of M2.1 earthquakes that occurred early Tuesday morning along the southern Sargent fault about three miles south of Gilroy (#3/1). Northern & Central California The week proved to be fairly quiet throughout the rest of northern and central California with no earthquakes as large as M3 anywhere in the region. The largest earthquakes were a pair of M2.9's that were part of two separate clusters of earthquakes that occurred along the eastern margin of the Sierra Nevada range. The first cluster, consisting of three M2, occurred last Friday & Saturday along the Mohawk Valley fault zone, about 12 miles east of Quincy (#2/2). The second cluster also occurred during this same period but in this case the four M2 earthquakes occurred in the northern Owens Valley area about 6 miles southeast of Bishop (#3/2). This second cluster appears to have been aftershock activity to a M4.2 on February 1 (see last week's summary). The San Andreas system experienced nothing larger than a M2.4, which occurred Sunday morning on the Maacama fault about seven miles north of Ukiah (#5/2). Even the Cape Mendocino area was barely active at the M2 level (#4/2). South of the Bay Area the San Andreas was quiet at the M2 level. The only M2 earthquakes in the region were a M2.1 six miles northeast of Coalinga (#6/2) and a M2.1 along the coast about 14 miles northwest of San Simeon (#8/2). Long Valley Caldera Caldera seismicity increased somewhat during the week with clusters of small earthquakes occurring at both ends of the south moat area. The most active cluster was at the west end, two miles southeast of Mammoth Lakes (#1/3). Some tens of earthquakes occurred here, primarily during the early part of the week, capped by seven earthquakes as large as M2.0. None of these events were reported to have been felt. The eastern cluster was less energetic, producing only two events as large as M2 (#2/3). A couple of M2's also occurred along the southern rim of the caldera. The first was a M2.2 early Sunday morning that occurred east of Convict Lake (#3/3). It was followed the next morning by a M2.3 that occurred just north of the lake (#5/3). The week's largest event was a M2.8 Sunday morning on the Hilton Creek fault (#4/3). It was followed minutes later by a M2.2 aftershock. USA Seismicity (January 31 - February 9) If northern California was quieter than normal during the past week, southern California and the rest of the country more than made up for it. Aftershocks continued in the Northridge area of Los Angeles, though only two of these were as large as M4 (#2/4). Seismologists with the Southern California Seismographic Network note that the Northridge sequence is decaying normally with fewer and, on average, smaller earthquakes occurring each week. They warn however that one more aftershock as large as M5 could occur during the next year. Aftershock activity also continued along the Idaho/Wyoming border, the location of a Mb5.5 shaker during the previous week. This week's largest aftershock was only slightly smaller than the mainshock and consequently was widely felt in southeastern Idaho, western Wyoming, and in the Salt Lake City, Utah area (#3/4). Nearly forty aftershocks larger than M3.5 have been recorded by the National Earthquake Information Center during the week and activity was continuing as of February 10. Other domestic earthquakes of interest include a M4.2 on the New Madrid seismic zone, east of Cape Girardeau, MO (#5/4), a M2.8 about 20 miles north of Cedar City, UT (#1/4), and a M3.9 in Death Valley, CA (#4/4). The Planet Earth (January 31 - February 9) The only strong earthquake on the planet during the week occurred along the East African Rift Valley in western Uganda (#4/5). At least two people were killed and several injured by this Ms6.2 quake. Most buildings in the Fort Portal area were damaged. The earthquake was felt at Kampala, Uganda and in eastern Zaire. Four M4-5 earthquakes occurred along mid-ocean ridges during the week including a Mb5.1 along the southwest Indian Ridge, a Ms5.6 along the southeast Indian Ridge (#3/5), a Mb4.9 beneath the central mid-Atlantic Ridge, and a Ms5.3 beneath northern Iceland, which is bisected by the north mid-Atlantic Ridge (#6/5). Other earthquakes of note include: 1) a Mb4.9 in southwestern India that was felt in the states of Goa and Maharishtra (#1/5), 2) a Mb5.1 and a Mb4.9 beneath northern Chile (#2/5), and 3) a Mb5.0 beneath the Peru- Bolivia border (#5/5). Table 1. Northern & Central California Seismicity (M>1.0) --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 94 FEB 3 810 34.29 38 49.12 122 48.58 3.98 8 .03 .3 .8 GEY 1.1 94 FEB 3 842 39.30 40 37.58 124 17.05 18.46 10 .12 1.3 .8 EUR 1.4 94 FEB 3 920 28.91 37 38.67 118 56.26 6.87 22 3 .13 .4 .5 SMO 1.9 94 FEB 3 921 31.53 37 38.67 118 56.00 5.96 11 .08 .5 .8 SMO 1.1 94 FEB 3 933 25.10 37 38.91 118 56.69 6.39 32 3 .13 .3 .4 SMO 2.0 94 FEB 3 1014 28.22 37 38.88 118 56.12 5.08 9 .11 .6 1.2 SMO 1.0 94 FEB 3 1028 52.64 37 39.20 118 55.83 5.40 13 .15 .6 1.1 SMO 1.2 94 FEB 3 1053 58.26 37 38.29 118 55.83 6.43 13 .07 .5 .9 SMO 1.2 94 FEB 3 1104 8.25 37 38.53 118 56.29 7.02 35 3 .14 .3 .4 SMO 2.1 94 FEB 3 1104 17.91 38 48.85 122 48.49 4.40 15 .05 .3 .6 GEY 1.6 94 FEB 3 1142 23.27 37 39.20 118 55.22 0.02 7 .16 .5 1.0 SMO * 1.0 94 FEB 3 1206 47.28 37 39.31 118 55.49 6.13 12 .13 .6 1.0 SMO 1.0 94 FEB 3 1250 35.51 37 38.35 118 52.74 5.53 8 .09 .8 2.0 SMO 1.2 94 FEB 3 1521 49.09 39 54.81 123 59.22 0.08 10 1 .21 1.0 2.8 PAR * 1.4 94 FEB 3 1523 11.44 37 36.83 118 48.96 5.83 9 .12 .5 1.4 HCF 1.0 94 FEB 3 1609 34.44 37 38.90 118 56.01 5.39 7 .05 .5 1.1 SMO 1.0 94 FEB 3 1624 3.98 37 38.61 118 56.16 5.63 7 .10 .7 1.5 SMO 1.0 94 FEB 3 1741 33.50 38 47.16 122 45.05 0.39 7 .06 .3 1.1 GEY 1.6 94 FEB 3 1753 28.95 37 31.36 118 45.82 4.44 7 .02 .8 .8 WCN 1.1 94 FEB 3 1939 27.96 37 31.63 118 46.94 5.46 11 .10 .7 .9 MOR 1.3 94 FEB 3 2021 6.22 36 53.83 121 36.86 2.59 18 .15 .4 .9 SJB 2.1 94 FEB 3 2027 0.07 37 38.51 118 54.80 0.45 8 .14 .4 .8 SMO 1.0 94 FEB 3 2142 25.43 37 25.90 118 37.63 13.60 32 3 .10 .4 .8 RVL 1.7 94 FEB 3 2213 45.65 37 38.34 118 56.02 6.53 9 .07 .7 1.4 SMO 1.1 94 FEB 3 2225 56.46 37 38.29 118 56.25 6.11 30 3 .11 .3 .4 SMO 1.8 94 FEB 3 2237 40.69 37 34.21 119 58.19 28.64 9 4 .13 1.0 1.3 KAI 1.4 94 FEB 3 2237 43.31 37 38.39 118 56.33 5.86 33 3 .11 .3 .4 SMO 2.0 94 FEB 3 2238 11.70 40 16.64 124 16.90 14.64 9 1 .04 .5 .6 MEN 1.4 94 FEB 3 2240 5.19 37 38.24 118 55.80 6.07 11 .09 .5 .9 SMO 1.3 94 FEB 3 2245 10.71 37 38.35 118 55.72 5.57 14 .11 .5 .8 SMO 1.6 94 FEB 3 2252 14.33 37 38.21 118 55.97 6.42 11 .11 .7 1.0 SMO 1.3 94 FEB 3 2345 49.19 37 38.15 118 56.59 7.15 9 .10 .9 1.4 SMO 1.2 94 FEB 3 2352 11.47 37 38.37 118 56.31 6.47 10 .09 .7 1.0 SMO 1.4 94 FEB 4 57 31.08 37 38.38 118 55.95 6.50 11 .11 .6 1.1 SMO 1.2 94 FEB 4 103 42.86 37 38.37 118 55.92 7.10 9 .08 .9 1.2 SMO 1.1 94 FEB 4 209 47.48 37 38.44 118 56.38 8.41 10 .19 1.0 2.1 SMO 1.4 94 FEB 4 214 12.47 37 39.26 118 55.98 6.76 7 .11 1.1 2.8 SMO 1.3 94 FEB 4 217 32.19 37 38.91 118 55.26 7.14 12 .14 .6 1.1 SMO 1.3 94 FEB 4 223 37.22 37 38.67 118 55.81 5.86 15 .14 .5 1.0 SMO 1.6 94 FEB 4 235 46.84 37 38.60 118 55.99 6.56 21 .15 .4 .7 SMO 1.9 94 FEB 4 239 26.26 37 38.58 118 55.80 5.70 16 .13 .4 .9 SMO 1.6 94 FEB 4 305 15.47 37 38.41 118 55.95 6.26 16 .10 .4 .8 SMO 1.5 94 FEB 4 308 35.16 37 38.87 118 56.03 6.97 11 .11 .8 1.2 SMO 1.4 94 FEB 4 315 10.85 37 38.70 118 55.34 6.49 7 .12 .7 1.9 SMO 1.2 94 FEB 4 335 48.83 37 38.10 118 55.82 1.02 10 .20 .6 1.6 SMO 1.3 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 94 FEB 4 403 43.38 37 38.37 118 56.28 6.77 21 .16 .4 .8 SMO 1.9 94 FEB 4 404 13.61 37 38.71 118 55.91 6.62 14 .11 .6 .8 SMO 1.7 94 FEB 4 412 28.89 37 37.73 118 55.62 7.31 11 .14 .8 1.0 SMO 1.0 94 FEB 4 423 10.85 37 39.37 118 55.61 7.22 8 .08 .7 1.0 SMO 1.4 94 FEB 4 426 17.31 37 38.68 118 55.40 5.97 12 .15 .6 .9 SMO 1.2 94 FEB 4 507 0.90 37 38.62 118 56.32 6.26 10 .07 .7 .8 SMO 1.0 94 FEB 4 509 41.18 37 39.05 118 55.96 9.49 8 .19 1.9 3.4 SMO 1.1 94 FEB 4 514 48.88 37 38.82 118 55.75 6.79 14 .12 .5 .8 SMO 1.3 94 FEB 4 544 5.57 37 38.49 118 55.85 5.10 18 .18 .6 1.0 SMO 1.8 94 FEB 4 547 20.16 37 38.74 118 55.59 6.42 17 .09 .4 .7 SMO 1.8 94 FEB 4 554 13.66 37 38.95 118 55.61 7.84 12 .10 .6 1.0 SMO 1.2 94 FEB 4 602 13.40 37 38.43 118 55.59 6.94 10 .13 .7 1.4 SMO 1.0 94 FEB 4 626 37.72 37 38.78 118 55.52 6.92 7 .11 .9 1.4 SMO 1.0 94 FEB 4 627 51.13 37 38.83 118 55.62 7.12 16 .16 .6 1.1 SMO 1.5 94 FEB 4 640 38.42 37 38.22 118 55.89 7.43 8 .10 .7 1.2 SMO 1.3 94 FEB 4 803 31.41 37 38.49 118 56.46 6.56 34 2 .14 .3 .5 SMO 2.2 94 FEB 4 858 5.32 38 47.48 122 27.50 7.63 8 .08 .4 .7 GVL 1.2 94 FEB 4 905 22.38 37 38.70 118 55.36 6.96 13 .11 .5 1.0 SMO 1.4 94 FEB 4 911 7.50 37 38.42 118 56.24 6.40 25 .19 .5 .7 SMO 2.0 94 FEB 4 917 53.16 37 38.31 118 54.89 5.48 10 .12 .5 1.2 SMO 1.4 94 FEB 4 918 23.92 37 38.60 118 55.07 0.87 8 .19 .4 .7 SMO 1.8 94 FEB 4 927 42.05 37 38.71 118 55.79 6.38 14 .14 .6 .9 SMO 1.8 94 FEB 4 1019 45.06 36 44.13 121 12.21 7.61 15 .08 .4 .6 PAI 1.5 94 FEB 4 1025 4.24 37 38.34 118 48.89 4.18 34 1 .13 .3 .5 HCF 2.3 94 FEB 4 1126 8.38 37 38.09 118 55.93 6.42 10 .13 .9 1.1 SMO 1.0 94 FEB 4 1248 0.31 37 38.48 118 56.32 6.23 18 .12 .5 .7 SMO 2.1 94 FEB 4 1318 14.21 38 21.22 122 24.15 8.09 31 2 .20 .4 .8 NAP 2.1 94 FEB 4 1359 48.23 38 47.64 122 45.82 1.37 8 .03 .3 .7 GEY 1.3 94 FEB 4 1420 11.66 38 47.43 122 44.55 2.11 15 .12 .3 .8 GEY 1.9 94 FEB 4 1500 49.92 37 36.50 118 48.84 5.79 13 .13 .5 .9 HCF 1.7 94 FEB 4 1528 49.15 37 17.24 118 21.01 6.16 8 .05 .4 1.7 OWV 1.7 94 FEB 4 1737 8.78 38 48.19 122 27.51 7.47 8 .10 .6 .8 GVL 1.0 94 FEB 4 1919 27.15 37 38.21 118 55.80 6.60 13 .15 .6 1.1 SMO 1.3 94 FEB 4 1927 27.43 36 0.37 120 33.11 6.10 7 .05 .7 1.4 SLA 1.1 94 FEB 4 1933 2.50 38 51.51 122 49.77 1.73 8 .05 .5 .9 GEY 1.0 94 FEB 4 1941 12.21 37 36.14 118 49.03 5.13 23 .11 .3 .5 HCF 1.7 94 FEB 4 1944 2.76 39 56.29 120 42.45 1.35 26 .16 1.214.4 WAK - 2.9 94 FEB 4 2031 58.51 37 38.52 118 54.79 6.63 9 .19 1.3 1.7 SMO 1.1 94 FEB 4 2035 33.88 37 38.35 118 55.77 6.42 16 .12 .6 .6 SMO 2.0 94 FEB 4 2038 57.33 37 38.59 118 55.55 7.87 12 .18 .9 1.8 SMO 1.5 94 FEB 4 2039 57.66 37 39.03 118 54.70 7.03 11 .18 .9 1.7 DOM 1.6 94 FEB 4 2047 21.66 38 47.87 122 47.54 0.80 7 .05 .3 .6 GEY 1.0 94 FEB 4 2048 45.36 37 38.83 118 55.52 7.01 13 .13 .8 1.0 SMO 1.3 94 FEB 4 2049 58.48 37 38.53 118 55.63 6.81 18 .14 .5 1.0 SMO 1.9 94 FEB 4 2055 14.21 37 38.54 118 55.49 4.62 7 .11 .8 2.7 SMO 1.0 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 94 FEB 4 2136 23.90 37 38.55 118 55.69 6.22 17 .14 .5 .8 SMO 2.0 94 FEB 4 2141 44.19 37 38.62 118 55.78 6.16 9 .15 1.0 1.5 SMO 1.0 94 FEB 4 2154 24.60 37 32.94 118 26.60 6.80 7 .07 .6 .6 CHV 1.4 94 FEB 4 2203 6.40 37 38.67 118 55.80 6.34 19 .14 .5 .7 SMO 1.8 94 FEB 4 2204 11.97 37 39.38 118 55.53 8.73 13 .10 .8 1.2 SMO 1.3 94 FEB 4 2219 24.07 37 39.23 118 55.10 7.56 9 .12 .9 1.3 DOM 1.1 94 FEB 4 2221 42.91 37 25.49 118 32.79 15.71 9 .06 .6 1.9 CHA 1.1 94 FEB 4 2246 57.98 37 37.47 118 55.91 7.75 8 .08 .7 1.0 SMO 1.0 94 FEB 5 7 53.72 37 38.27 118 55.88 6.55 10 .07 .4 1.0 SMO 1.3 94 FEB 5 44 50.93 37 17.47 118 20.52 9.52 10 .10 .6 1.5 OWV 1.7 94 FEB 5 49 41.76 37 38.35 118 55.91 7.13 11 .13 .6 1.2 SMO 1.2 94 FEB 5 133 44.70 37 34.58 118 51.14 9.20 19 .15 .4 .9 MOR 1.6 94 FEB 5 158 17.57 37 34.62 118 50.90 8.42 20 .17 .5 .9 MOR 1.4 94 FEB 5 303 29.23 38 55.73 122 42.16 1.71 15 .08 .3 .7 KON 1.9 94 FEB 5 324 12.43 37 38.57 118 56.21 6.45 24 .19 .5 .8 SMO 2.3 94 FEB 5 328 2.72 37 38.34 118 56.51 9.58 12 .10 .6 1.7 SMO 1.0 94 FEB 5 334 38.01 37 38.66 118 55.07 7.34 10 .11 .5 1.2 SMO 1.2 94 FEB 5 335 38.29 37 38.74 118 55.59 6.33 16 .13 .5 .8 SMO 1.6 94 FEB 5 438 11.90 37 38.37 118 55.41 8.40 13 .21 .9 1.6 SMO 1.3 94 FEB 5 453 42.83 37 26.07 118 33.05 9.33 8 .07 .5 1.8 RVL 1.2 94 FEB 5 501 53.56 37 32.60 118 25.53 7.59 8 .04 .6 .5 CHV 1.4 94 FEB 5 514 42.18 37 38.59 118 55.49 7.06 12 .11 .5 1.1 SMO 1.1 94 FEB 5 535 6.48 37 38.81 118 55.27 7.92 12 .10 .6 1.1 SMO 1.2 94 FEB 5 619 0.01 37 38.55 118 55.47 6.98 15 .14 .5 1.1 SMO 1.6 94 FEB 5 620 16.88 37 38.07 118 55.57 9.70 8 .08 .8 1.4 SMO 1.0 94 FEB 5 658 49.85 37 17.04 118 21.18 8.82 27 .09 .4 .9 OWV 2.6 94 FEB 5 700 51.46 37 17.16 118 20.95 8.91 29 .09 .4 1.0 OWV 2.8 94 FEB 5 720 55.51 37 36.41 118 48.88 5.04 7 .15 .7 1.9 HCF 1.0 94 FEB 5 743 51.46 37 38.58 118 56.12 3.93 8 .10 .5 1.4 SMO 1.0 94 FEB 5 758 6.83 37 38.30 118 56.11 7.70 9 .08 .9 1.4 SMO 1.0 94 FEB 5 805 50.27 37 38.62 118 55.64 7.83 11 .11 .6 1.2 SMO 1.0 94 FEB 5 819 11.10 37 38.89 118 55.72 7.00 12 .11 .6 1.0 SMO 1.4 94 FEB 5 903 23.85 37 17.21 118 21.21 3.47 15 .12 .4 1.7 OWV 2.0 94 FEB 5 939 55.27 37 39.27 118 56.05 8.80 8 .14 1.3 2.0 SMO 1.0 94 FEB 5 940 36.91 37 17.26 118 20.95 7.17 8 .06 1.2 2.1 OWV 1.7 94 FEB 5 949 16.44 35 36.75 118 14.37 13.08 7 .14 .9 2.2 WWF 1.6 94 FEB 5 1021 30.25 38 49.75 122 45.55 0.61 8 .06 .3 1.1 GEY 1.2 94 FEB 5 1049 33.53 38 49.52 122 49.73 1.32 9 .05 .3 .8 GEY 1.0 94 FEB 5 1102 47.30 38 50.00 122 49.83 2.48 7 .02 .5 .9 GEY 1.4 94 FEB 5 1152 31.34 38 46.22 122 42.79 0.99 10 .12 .6 .4 GEY 1.5 94 FEB 5 1224 27.31 38 47.13 122 28.25 7.07 9 .13 .6 1.1 GVL 1.7 94 FEB 5 1441 23.14 37 34.51 118 51.24 8.22 17 .12 .5 .8 MOR 1.4 94 FEB 5 1511 22.71 38 47.10 122 46.26 1.25 20 .12 .3 1.1 GEY 2.3 94 FEB 5 1515 8.74 37 38.69 118 55.37 4.95 12 .12 .5 1.0 SMO 1.4 94 FEB 5 1547 28.63 38 46.20 122 44.00 1.62 13 .10 .3 .6 GEY 1.7 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 94 FEB 5 1547 56.76 37 38.62 118 55.54 5.26 12 .11 .4 .9 SMO 1.3 94 FEB 5 1726 20.95 37 38.26 118 55.43 5.95 16 .13 .5 .8 SMO 1.5 94 FEB 5 1729 8.60 37 38.44 118 54.92 2.01 9 .21 .6 1.3 SMO 1.2 94 FEB 5 1802 36.42 37 39.07 118 55.80 7.98 14 .10 .6 1.1 SMO 2.4 94 FEB 5 1808 38.64 37 39.35 118 56.26 9.86 10 .09 1.2 2.1 SMO 1.1 94 FEB 5 1809 24.28 37 38.72 118 55.37 7.56 10 .10 .6 1.2 SMO 1.3 94 FEB 5 1821 59.65 40 14.06 124 7.56 13.19 7 .14 .9 1.0 MEN 2.0 94 FEB 5 1851 21.13 37 38.69 118 55.86 5.63 8 .06 .6 1.1 SMO 1.2 94 FEB 5 2031 51.34 37 38.78 118 56.11 7.82 8 .12 1.0 2.3 SMO 1.0 94 FEB 5 2207 18.68 38 46.89 122 42.98 2.85 8 .10 .6 1.0 GEY 1.2 94 FEB 5 2356 20.04 37 38.96 118 52.67 6.51 9 .09 .6 1.0 SMO 1.5 94 FEB 6 131 34.07 37 38.57 118 55.74 6.77 17 .17 .6 1.0 SMO 1.8 94 FEB 6 132 2.57 37 38.50 118 55.72 7.73 11 .09 1.0 1.1 SMO 1.3 94 FEB 6 306 16.26 37 33.43 118 29.41 12.44 14 .08 .4 1.3 CHV 1.9 94 FEB 6 400 59.77 37 25.45 118 32.87 16.20 8 .14 .8 2.9 CHA 1.3 94 FEB 6 507 8.57 38 49.91 122 49.47 2.04 18 .10 .3 .8 GEY 2.1 94 FEB 6 523 15.18 39 55.80 120 43.30 5.01 18 .23 1.917.8 WAK - 2.5 94 FEB 6 549 21.50 39 56.20 120 43.76 0.00 22 .21 1.4 3.4 WAK * 2.6 94 FEB 6 651 11.71 37 38.99 118 55.68 7.92 13 .11 .6 1.0 SMO 1.2 94 FEB 6 739 53.74 38 46.60 122 45.11 2.08 9 .03 .3 .7 GEY 1.2 94 FEB 6 1041 7.64 37 35.35 118 49.16 6.24 22 .16 .4 .7 MOR 1.9 94 FEB 6 1300 29.90 38 49.95 122 52.72 1.13 10 .05 .3 .9 GEY 1.3 94 FEB 6 1326 3.95 39 14.65 123 13.02 5.80 23 .11 .3 1.4 MAA 2.4 94 FEB 6 1440 13.65 37 35.40 118 49.39 6.38 26 .15 .4 .7 MOR 2.2 94 FEB 6 1700 37.39 37 33.22 118 46.94 2.42 29 .12 .3 .8 MOR 2.8 94 FEB 6 1701 54.52 37 32.84 118 47.06 2.71 14 .14 .5 .9 MOR 1.7 94 FEB 6 1706 31.30 37 33.25 118 46.67 2.24 23 .12 .3 .8 MOR 2.2 94 FEB 6 2039 40.92 37 17.11 118 21.02 9.08 28 .09 .5 1.0 OWV 2.9 94 FEB 6 2055 22.67 37 38.61 118 53.66 10.53 10 .11 .8 1.8 SMO 1.1 94 FEB 7 235 35.95 37 38.11 118 49.02 3.50 29 .14 .3 .7 HCF 2.3 94 FEB 7 241 31.21 37 38.43 118 48.60 3.53 10 .13 .5 1.2 HCF 1.8 94 FEB 7 308 33.30 37 38.42 118 48.61 3.21 13 .13 .4 1.0 HCF 1.6 94 FEB 7 314 6.53 37 33.38 121 40.00 8.20 14 .10 .4 .7 HAM 1.4 94 FEB 7 437 45.92 36 10.13 120 16.31 8.56 24 .19 .5 1.2 COA 2.1 94 FEB 7 720 35.04 38 49.47 122 47.87 3.92 7 .01 .4 .8 GEY 1.2 94 FEB 7 840 12.98 41 14.06 122 11.29 4.89 7 .17 1.013.0 SHA - 1.8 94 FEB 7 1018 51.60 38 47.22 122 45.54 1.73 8 .06 .3 .9 GEY 1.3 94 FEB 7 1240 7.83 38 47.70 122 44.55 0.86 7 .08 .3 1.2 GEY 1.1 94 FEB 7 1448 10.02 37 30.85 118 0.18 4.64 17 .13 3.6 4.8 WHI 2.3 94 FEB 7 1514 22.16 37 36.79 118 51.63 4.84 27 .15 .3 .5 SMO 2.3 94 FEB 7 1516 49.09 37 37.15 118 50.62 6.60 7 .06 .6 1.1 SMO 1.0 94 FEB 7 1811 57.62 37 37.04 118 51.04 4.67 12 1 .13 .4 .9 SMO 1.5 94 FEB 7 1837 0.13 38 49.26 122 46.54 1.97 10 .04 .3 .6 GEY 1.4 94 FEB 7 1903 57.61 38 47.62 122 45.38 0.51 16 .10 .3 .7 GEY 1.7 94 FEB 7 2007 38.22 36 48.38 121 23.51 6.13 73 .20 .3 .6 HOL 2.5 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 94 FEB 8 121 17.41 37 36.96 118 51.19 4.27 15 1 .13 .4 .7 SMO 1.7 94 FEB 8 128 37.07 35 49.42 121 19.16 0.07 16 .16 1.0 4.8 SSM * 2.1 94 FEB 8 210 51.29 37 36.01 118 48.92 5.52 18 .12 .4 .6 HCF 1.8 94 FEB 8 216 8.50 37 17.18 121 40.09 2.04 27 .04 .2 .5 SFL 1.7 94 FEB 8 400 46.39 37 33.42 118 46.76 1.99 10 .12 .4 1.0 MOR 1.4 94 FEB 8 404 44.34 37 39.30 118 56.18 4.72 10 .15 .7 1.1 SMO 1.3 94 FEB 8 810 18.71 37 38.64 118 56.79 8.24 16 1 .11 .5 1.0 SMO 1.4 94 FEB 8 829 48.71 36 57.44 121 34.25 6.11 57 .19 .3 .6 SAR 2.1 94 FEB 8 1015 22.82 39 55.60 122 52.30 6.24 9 .26 .7 3.3 SAC * 2.0 94 FEB 8 1242 38.88 38 57.50 122 37.07 2.18 8 .03 .4 1.0 BAR 1.4 94 FEB 8 1347 47.31 37 38.27 118 53.02 9.52 7 1 .12 .8 2.2 SMO 1.0 94 FEB 8 1359 50.84 36 56.23 121 33.79 6.24 52 .19 .3 .6 SAR 2.1 94 FEB 8 1403 53.84 37 36.45 118 48.88 5.48 11 .13 .5 .9 HCF 1.6 94 FEB 8 1538 12.37 37 36.49 118 49.85 7.86 7 1 .14 1.3 2.7 SMO 1.0 94 FEB 8 1548 26.80 37 27.65 118 35.73 13.57 8 .07 .9 1.8 RVL 1.3 94 FEB 8 1831 41.87 37 28.49 118 37.86 6.18 9 2 .03 .3 .8 RVL 1.2 94 FEB 8 2045 39.81 37 28.39 118 48.44 10.63 12 1 .09 .6 1.2 MOR 1.2 94 FEB 8 2056 45.59 37 39.90 118 51.87 3.45 12 .17 .5 1.7 DOM 1.4 94 FEB 8 2248 16.21 37 38.07 118 57.74 8.92 20 .14 .5 .8 SMO 1.9 94 FEB 8 2358 23.71 38 50.48 122 49.01 2.66 9 .09 .3 1.1 GEY 1.2 94 FEB 9 217 18.19 37 38.39 118 57.11 7.74 12 .10 .5 1.2 SMO 1.5 94 FEB 9 532 14.84 38 50.05 122 47.65 1.14 17 .05 .2 .8 GEY 2.1 94 FEB 9 533 54.41 38 49.91 122 48.03 0.88 8 .03 .3 .8 GEY 1.1 94 FEB 9 539 32.63 38 49.80 122 47.98 0.92 22 .14 .3 .8 GEY 2.1 94 FEB 9 540 21.69 38 49.37 122 49.75 0.03 7 .15 .7 2.1 GEY * 1.0 94 FEB 9 606 6.44 37 36.41 118 48.81 5.72 10 .13 .6 1.2 HCF 1.2 94 FEB 9 753 25.32 37 29.64 121 32.98 7.40 9 .10 .4 1.2 HAM 1.3 94 FEB 9 804 4.50 39 22.80 123 7.97 1.75 11 .11 .510.6 MAA - 1.7 94 FEB 9 1031 7.12 36 57.94 121 42.71 6.79 20 .09 .3 .8 SJB 1.5 94 FEB 9 1315 41.61 37 38.55 118 52.48 7.47 9 .15 .8 2.2 SMO 1.1 94 FEB 9 1412 44.59 37 38.47 118 54.91 3.79 7 1 .04 .4 1.1 SMO 1.1 94 FEB 9 1513 58.05 37 38.41 118 49.85 7.92 10 1 .14 .6 1.7 HCF 1.2 94 FEB 9 1518 35.44 37 38.72 118 50.01 8.53 10 .09 .5 1.1 HCF 1.4 94 FEB 9 1533 43.90 37 34.91 118 50.78 7.84 12 1 .13 .5 1.3 MOR 1.4 94 FEB 9 1600 45.65 37 38.21 118 49.96 8.48 9 1 .13 .5 1.2 HCF 1.2 94 FEB 9 1748 25.74 37 38.49 118 56.29 9.39 7 1 .09 1.0 1.9 SMO 1.0 94 FEB 9 1810 24.39 37 38.82 118 55.58 7.62 14 .12 .5 1.0 SMO 1.3 94 FEB 9 1835 50.27 38 47.54 122 46.63 1.78 8 .07 .4 .7 GEY 1.1 94 FEB 9 1915 36.96 37 38.31 118 50.16 8.59 14 .11 .4 .9 HCF 1.5 94 FEB 9 1917 34.14 37 37.61 118 48.83 5.05 7 1 .12 .6 1.9 HCF 1.0 94 FEB 9 2054 51.28 38 48.09 122 47.00 0.88 7 .01 .3 1.8 GEY 2.2 94 FEB 9 2130 27.71 37 39.46 118 48.72 13.77 8 .07 2.1 2.5 HCF 1.1 94 FEB 9 2147 9.64 40 24.99 124 21.64 10.88 13 .07 .6 .3 MEN 2.1 94 FEB 9 2249 21.22 38 47.73 122 46.21 1.43 8 .07 .3 .8 GEY 1.1 94 FEB 9 2315 48.24 37 38.48 118 56.33 5.31 9 2 .14 .7 1.4 SMO 1.2 --ORIGIN TIME (UT)-- -LAT N-- --LON W-- DEPTH N N RMS ERH ERZ DUR YR MON DA HRMN SEC DEG MIN DEG MIN KM RD S SEC KM KM REMKS MAG 94 FEB 9 2350 29.25 37 38.79 118 55.58 4.70 11 .16 .6 1.5 SMO 1.2 94 FEB 10 110 4.42 37 36.11 118 49.08 5.28 10 1 .09 .5 .9 HCF 1.2 94 FEB 10 306 48.39 37 37.73 118 51.99 7.18 13 .15 .5 1.1 SMO 1.4 94 FEB 10 312 41.76 37 38.06 118 51.97 7.30 14 1 .14 .5 .9 SMO 1.3 94 FEB 10 407 23.37 36 28.04 121 2.48 5.33 10 .05 .5 1.1 BIT 1.3 94 FEB 10 424 31.37 37 37.80 118 50.96 5.49 8 .17 .7 1.6 SMO 1.0 94 FEB 10 427 24.13 38 48.22 122 48.08 3.01 10 .06 .3 .6 GEY 1.2 94 FEB 10 445 20.45 37 38.98 118 52.40 6.85 8 1 .07 .8 .9 SMO 1.0 94 FEB 10 514 47.03 38 48.20 122 47.96 1.39 9 .04 .3 .4 GEY 1.2 94 FEB 10 521 5.72 37 37.58 118 51.68 3.47 9 .11 .5 1.7 SMO 1.1 94 FEB 10 529 11.84 37 38.06 118 52.42 7.80 20 .13 .4 .7 SMO 1.7 94 FEB 10 539 31.16 37 38.05 118 51.92 7.89 9 .14 .7 1.6 SMO 1.1 94 FEB 10 607 57.96 38 50.46 122 48.64 2.34 9 .05 .3 .9 GEY 1.3 94 FEB 10 721 28.51 38 49.94 122 49.67 1.67 12 .07 .3 .8 GEY 1.7 94 FEB 10 724 38.39 38 49.93 122 49.24 0.01 12 .11 .4 2.9 GEY * 2.1 94 FEB 10 727 35.57 38 50.03 122 49.68 1.13 9 .05 .4 .8 GEY 1.4 TABLE 2. Data from National Earthquake Information Center (NEIC) UTC TIME LAT LONG DEP GS MAGS SD STA REGION AND COMMENTS HRMNSEC MB Msz USED -------------------------------------------------------------------------------- JAN 31 023615.3* 7.587S 73.844W 33N 4.6 1.1 20 PERU-BRAZIL BORDER REGION 095735.2? 37.40 S 52.19 E 10G 5.1 4.8 1.2 27 SOUTH INDIAN OCEAN 111006.4 33.776N 135.538E 64* 4.8 0.4 17 NEAR S. COAST OF WESTERN HONSHU 123935.8 38.103N 113.116W 1G 0.9 12 UTAH. ML 2.8 (GS). FEB 01 044703.9& 57.810N 152.470W 36 3.8 58 KODIAK ISLAND REGION. ML 3.6 061200.9* 53.447N 160.397E 33N 4.7 1.0 28 NEAR EAST COAST OF KAMCHATKA 074019.9& 34.232N 118.623W 3 45 SOUTHERN CALIFORNIA. MD 3.6 093055.7* 17.292N 73.587E 10G 4.9 1.3 28 SOUTHERN INDIA. Felt in the states of Goa and Maharashtra. Also felt in northern Karnataka. 095814.0 42.760N 111.071W 5G 0.9 37 EASTERN IDAHO. ML 3.5 (GS) 162938.3? 21.41 S 70.19 W 52D 5.1 1.3 17 NEAR COAST OF NORTHERN CHILE 173335.5* 4.073N 32.620W 10G 4.9 4.4 1.5 35 CENTRAL MID-ATLANTIC RIDGE FEB 02 010958.6 10.083S 161.011E 89D 5.1 0.6 55 SOLOMON ISLANDS 025410.9 13.636S 171.399E 500G 4.8 0.8 84 VANUATU ISLANDS REGION 050358.3? 22.22 S 66.51 W 243? 4.5 0.9 32 JUJUY PROVINCE, ARGENTINA 101208.1? 43.88 N 12.52 E 10G 3.8 1.2 16 CENTRAL ITALY. ML 3.8 (VIE). 110425.2 42.752N 111.070W 5G 0.9 40 EASTERN IDAHO. ML 4.0 (GS) 112437.8& 34.292N 118.610W 1 47 SOUTHERN CALIFORNIA. MD 3.7 120925.2 61.054N 140.054W 5G 4.1 1.3 97 SOUTHERN YUKON TERRITORY, CANADA. ML 4.4 (AEIC), 4.5 (PMR). 162007.7? 36.66 N 71.85 E 33N 4.6 1.0 14 AFGHANISTAN-TAJIKISTAN BORD REG. 180339.6% 36.525N 2.801W 10G 1.1 21 STRAIT OF GIBRALTAR. mbLg 4.1 231117.3* 14.365N 92.822W 33N 4.8 1.1 39 NEAR COAST OF CHIAPAS, MEXICO FEB 03 014952.9* 43.376N 111.018W 5G 0.9 8 EASTERN IDAHO. ML 2.7 (GS). 015235.6* 43.391N 111.019W 5G 1.0 7 EASTERN IDAHO. ML 2.6 (GS). 022523.5 12.096S 166.999E 282D 5.0 0.6 75 SANTA CRUZ ISLANDS 094533.0* 42.709N 111.083W 5G 0.6 8 EASTERN IDAHO. ML 3.5 (GS). 094736.9 42.732N 111.037W 5G 0.9 9 EASTERN IDAHO. ML 4.0 (GS). 095840.7 42.762N 111.048W 5G 1.0 21 EASTERN IDAHO. ML 4.2 (GS). 101303.9 42.783N 110.956W 5G 0.6 14 WYOMING. ML 3.7 (GS). 102331.5 15.431S 166.942E 33N 5.3 1.1 45 VANUATU ISLANDS 102551.9 42.792N 111.123W 5G 0.6 16 EASTERN IDAHO. ML 4.0 (GS). 103128.7* 42.789N 111.178W 5G 0.7 9 EASTERN IDAHO. ML 3.6 (GS). 104015.6 42.765N 111.003W 5G 0.8 15 EASTERN IDAHO. ML 3.9 (GS). 111907.5 42.778N 111.019W 5G 4.4 1.0 57 EASTERN IDAHO. ML 4.7 (GS). Felt in the epicentral area. 114650.9 42.798N 111.161W 5G 1.0 16 EASTERN IDAHO. ML 4.0 (GS). 114920.6* 42.877N 110.955W 5G 0.9 9 WYOMING. ML 3.9 (GS). 120457.0 42.722N 111.098W 5G 0.9 30 EASTERN IDAHO. ML 4.4 (GS). 131336.8 42.766N 111.020W 5G 0.7 11 EASTERN IDAHO. ML 3.7 (GS). 153439.7 42.747N 111.069W 5G 4.6 1.4 13 EASTERN IDAHO. ML 3.6 (GS). 154344.2* 41.880S 84.717E 10G 5.0 5.6 0.5 9 SOUTHEAST INDIAN RIDGE 162334.4 34.267N 118.479W 10G 3.9 0.8 54 SOUTHERN CALIFORNIA. ML 4.2 171950.9* 42.784N 110.972W 5G 0.6 12 WYOMING. ML 3.5 (GS). 191340.5 42.822N 111.158W 5G 0.8 13 EASTERN IDAHO. ML 3.9 (GS). 225738.3 42.688N 111.041W 5G 0.8 13 EASTERN IDAHO. ML 3.5 (GS). FEB 04 001009.6 36.491N 116.949W 10G 1.4 49 CALIFORNIA-NEVADA BORDER REGION. ML 3.9 (GS). Felt at Amargosa Valley and Death Valley. 024212.0 42.721N 111.018W 5G 4.8 1.1 49 EASTERN IDAHO. ML 5.2 (GS). Felt at Blackfoot, Idaho Falls, Lava Hot Springs, Ovid, Pocatello and Soda Springs, Idaho. Also felt at Freedom, Wyoming and Salt Lake City, Utah. 031008.4 42.835N 111.099W 5G 0.7 20 EASTERN IDAHO. ML 4.0 (GS). 053244.0 42.733N 111.197W 5G 0.8 16 EASTERN IDAHO. ML 3.6 (GS). 063338.8 34.258N 118.640W 10G 0.8 42 SOUTHERN CALIFORNIA. ML 3.7 070559.0 42.657N 111.045W 5G 0.9 15 EASTERN IDAHO. ML 3.6 (GS). 083018.7 42.728N 111.028W 5G 0.7 17 EASTERN IDAHO. ML 3.4 (GS). 142605.3 34.270N 118.419W 10G 0.7 41 SOUTHERN CALIFORNIA. ML 3.4 150332.9 42.813N 111.123W 5G 0.9 14 EASTERN IDAHO. ML 3.5 (GS). 165034.3 42.749N 111.063W 5G 0.4 18 EASTERN IDAHO. ML 3.9 (GS). Felt. 184933.7 42.751N 111.070W 5G 0.6 13 EASTERN IDAHO. ML 3.6 (GS). 193355.3 42.684N 111.059W 5G 1.2 14 EASTERN IDAHO. ML 3.5 (GS). 201551.1 34.286N 118.448W 10G 0.9 36 SOUTHERN CALIFORNIA. ML 3.1 210611.1* 21.774S 68.301W 122D 4.9 0.9 21 CHILE-BOLIVIA BORDER REGION 213525.0 42.826N 111.088W 5G 0.7 14 EASTERN IDAHO. ML 3.6 (GS). 214912.1 42.624N 111.066W 10G 4.2 1.4 17 EASTERN IDAHO. ML 4.0 (GS). Felt. FEB 05 070602.1 42.605N 110.949W 5G 4.1 0.9 21 WYOMING. ML 4.2 (GS). 085104.8 34.307N 118.691W 10G 0.9 44 SOUTHERN CALIFORNIA. ML 3.9 090407.1 42.815N 111.130W 5G 0.6 12 EASTERN IDAHO. ML 3.9 (GS). 090943.3 42.731N 111.041W 5G 4.0 1.1 23 EASTERN IDAHO. ML 4.2 (GS). 103848.6 42.681N 111.063W 5G 4.1 0.9 20 EASTERN IDAHO. ML 4.1 (GS). 145534.9 37.503N 89.072W 10G 4.2 1.2 12 CAPE GIRARDEAU, MISSOURI REGION. Felt in southern Illinois and southeastern Missouri. 222857.3 42.743N 111.073W 5G 0.7 13 EASTERN IDAHO. ML 3.6 (GS). 233408.6 0.561N 30.223E 10G 5.8 6.2 0.8 72 UGANDA. Mw 6.4 (GS), 6.2 (HRV). At least two people killed, several injured and most buildings damaged in the Fort Portal area, Uganda. Two people killed by landslides at Kasese, Uganda. Felt at Kampala, Uganda and in eastern Zaire. FEB 06 032809.4* 51.870N 170.065W 33N 4.6 0.8 17 FOX ISLANDS, ALEUTIAN ISLANDS 085948.1? 13.25 S 166.88 E 209D 4.9 0.7 21 VANUATU ISLANDS 102021.5 16.173S 69.142W 174D 5.0 0.5 68 PERU-BOLIVIA BORDER REGION 131924.9 34.235N 118.536W 10G 0.7 30 SOUTHERN CALIFORNIA. ML 4.1 132144.3 34.266N 118.514W 10G 0.5 38 SOUTHERN CALIFORNIA. ML 3.6 164651.1 42.743N 111.069W 5G 0.9 14 EASTERN IDAHO. ML 3.6 (GS). FEB 07 063547.2 42.662N 111.034W 5G 4.5 0.9 31 EASTERN IDAHO. ML 4.8 (GS). Felt at Afton, Wyoming. 103711.9 42.755N 111.007W 5G 0.8 16 EASTERN IDAHO. ML 3.5 (GS). 121545.4 42.696N 111.027W 5G 3.9 0.8 24 EASTERN IDAHO. ML 4.5 (GS). Felt at Afton, Wyoming. 164315.6 42.667N 111.138W 5G 0.8 14 EASTERN IDAHO. ML 3.5 (GS). FEB 08 032754.8 66.564N 19.255W 10G 5.2 5.3 0.8 62 ICELAND REGION FEB 10 005611 Q 42.8 N 111.1 W 10G 4.5 0.6 17 EASTERN IDAHO Notes: Origin time in the list is in GMT, in the text and on maps it is in local time. N RD: is the number of readings used to locate the event. N S: is the number of S waves in N RD. RMS SEC: is the root mean squared residual misfit for the location is seconds, the lower the better, over 0.3 to 0.5 seconds is getting bad, but this is machine, not hand timed, data. ERH: is the estimated horizontal error in kilometers. ERZ: is the estimated vertical error in kilometers. N FM: is the number of readings used to compute the magnitude. REMKS: obtuse region codes that denote the velocity model used to locate the event. DUR MAG: is the magnitude as determined from the duration of the seismograms, not the amplitude. Sort of like going to echo canyon and measuring how loud your yell is by counting echos. FIG: denotes the figure/event number in the maps posted separately.