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 DO NOT SEND EMAIL TO weekly@garlock.wr.usgs.gov It will not be read. Seismicity Report for Northern California, the Nation, and the World for the week of April 4 - 10, 1996 Stephen R. Walter U.S. Geological Survey 345 Middlefield Rd. MS-977, Menlo Park, CA 94025 San Francisco Bay Area Activity was very light throughout the Bay Area with no earthquakes as large as M2. During the seven-day period ending at midnight on Wednesday, April 10, 1996 the U.S. Geological Survey office in Menlo Park recorded just 10 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. None were as large as M2. This total compares to 15 earthquakes during the previous seven-day period (March 28 - April 3 ), five of which were as large as M2.0. The only events of note in the Bay Area were a M1.8 on the San Andreas fault west of Golden Gate Park in San Francisco (#1/1) and a M1.7 on the Antioch fault just west of the town of Antioch (#2/1). Northern & Central California Four M2 earthquakes occurred southwest of Eureka last Thursday afternoon (#1/2). They were followed early the next morning by a M3.4 that was felt in the Eureka area. All occurred at a depth of around 22 km, indicating they resulted from movement of the Gorda Plate which underthrusts this part of the state. An even deeper M2.4 event followed on Monday (#8/2). The Mendocino fracture zone also produced several earthquakes, most notably a M3.8 that was located about 60 miles west of Petrolia. Several M2 events occurred along the fracture zone just 12 miles west of Petrolia (#5/2). Activity in the Coast Ranges was minimal with one M2 event along the Bartlett Springs fault north of Clear Lake and the usual M2 activity at the Geysers geothermal area. The only event of note in the region was a M3.1 in the central Sacramento Valley about nine miles southeast of Willows (#4/2). Several areas in the Sierra Nevada Range experienced minor activity during the week. Last Thursday evening a M2.1 occurred in the western Sierra Nevada foothills about 22 miles north of Madera (#2/2). To the east a M2.2 occurred south of Long Valley caldera and a M2.5 occurred in the Chalfant Valley area (#7/2). Farther north a pair of M2 events accurate in the Mono Basin (#9/2) and a trio of near-M3's occurred north of Lake Tahoe and about eleven miles southwest of Reno, NV (#6/2). Central California was very quiet with two M2 events along the creeping segment of the San Andreas just north of the Pinnacles. Long Valley Caldera Activity declined during the week in the area just south of the airport (#1/3). During the previous week over 500 earthquakes of M1.5 or larger occurred here; during this past week, the total was fewer than 80. Of these only a dozen were as large as M2, the largest a M2.5 early Wednesday afternoon. The only significant activity south of the caldera were a pair of M2's southeast of Mt. Morrison (#2,#3/3). USA Seismicity (April 2 - 11) The National Earthquake Information Center reported several notable earthquakes in the region of the lower 48 states. The largest, a M4.1, occurred offshore of central Oregon along the central Blanco Fracture zone (#6/4). Onshore, Oregon was also the site of two other earthquakes including a M3.5 that was felt in the coastal town of Gold Beach (#4/4) and a M2.9 beneath Mt. Hood that was not reported to have been felt (#2/4). Among the more unusual was a M3.5 in the southwestern corner of South Dakota (#5/4). In southern California a M3.9 occurred Monday afternoon about 17 miles north of Yucca Valley, an aftershock to the M7.3 Landers earthquake of June 28, 1992. Earlier in the week a M3.0 occurred in the Simi Valley area north of Los Angeles. The Planet Earth (April 2 - 11) A quiet week on the planet with no earthquakes as large as M6. The largest event was a Mb5.8 south of Guadalcanal, the largest of the Solomon Islands (#5/5). Earlier in the week a Mb5.6 occurred in the northwestern Solomon Islands (#3/5). Other events of note include a Mb4.7 near the island of Crete that was felt in western Creta and at Khania (#1/5), a Mb5.3 near the east coast of Kamchatka (#2/5), and a Mb5.0 in the Windward Islands offshore of the island of Dominica (#4/5) 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 96 APR 4 805 52.77 37 37.95 118 52.81 8.03 10 .05 .4 .6 SMO 1.4 96 APR 4 809 31.64 37 38.14 118 51.09 8.43 10 .12 1.7 1.0 SMO 1.1 96 APR 4 817 30.28 37 37.70 118 52.41 6.97 11 .05 .5 .7 SMO 1.4 96 APR 4 856 42.92 37 37.19 118 52.39 6.46 11 .06 .4 .6 SMO 1.4 96 APR 4 910 25.83 37 37.27 118 51.30 6.11 13 .10 .6 .7 SMO 1.4 96 APR 4 944 7.24 37 37.20 118 52.29 6.51 11 .07 .4 .6 SMO 1.4 96 APR 4 1002 23.89 37 38.25 118 51.06 9.39 8 .06 1.0 2.0 SMO 1.0 96 APR 4 1027 33.61 38 49.34 122 47.87 3.72 12 .04 .3 .6 GEY 1.6 96 APR 4 1051 56.31 37 37.54 118 52.44 5.90 15 .05 .5 .4 SMO 1.9 96 APR 4 1115 32.56 37 37.61 118 51.98 7.01 10 .02 .6 1.1 SMO 1.2 96 APR 4 1200 50.83 37 37.78 118 50.40 9.79 7 .05 .9 2.0 HCF 1.0 96 APR 4 1213 53.41 37 37.37 118 52.79 6.88 12 .06 .5 .7 SMO 1.2 96 APR 4 1226 26.23 37 37.21 118 52.48 6.68 14 .08 .4 .5 SMO 1.9 96 APR 4 1241 8.66 37 39.17 118 53.15 5.98 8 .06 .8 .9 DOM 1.0 96 APR 4 1306 9.70 37 37.89 118 52.10 8.26 10 .05 .6 1.1 SMO 1.5 96 APR 4 1318 51.04 38 49.22 122 47.85 3.58 12 .03 .2 .6 GEY 1.8 96 APR 4 1319 57.84 38 48.90 122 47.72 5.29 10 .10 .5 .9 GEY 1.4 96 APR 4 1348 22.50 37 37.96 118 51.52 8.08 10 .06 .7 1.4 SMO 1.1 96 APR 4 1353 0.69 37 37.11 118 51.62 5.24 8 .03 .4 .7 SMO 1.3 96 APR 4 1358 47.68 38 48.72 122 48.60 5.36 9 .09 .5 1.0 GEY 1.3 96 APR 4 1419 54.73 37 37.65 118 52.72 7.06 7 .04 .8 1.2 SMO 1.0 96 APR 4 1447 45.37 37 37.50 118 53.09 8.87 15 .07 .4 .6 SMO 1.9 96 APR 4 1448 46.03 37 37.78 118 52.93 9.29 10 .07 .7 1.9 SMO 1.2 96 APR 4 1534 20.40 37 37.15 118 52.27 6.32 12 .06 .5 .4 SMO 1.6 96 APR 4 1539 44.86 37 38.00 118 51.49 8.58 9 .05 .8 1.5 SMO 1.1 96 APR 4 1555 0.21 37 37.94 118 52.65 6.52 9 .03 .7 1.0 SMO 1.2 96 APR 4 1556 41.57 37 37.34 118 51.18 6.13 12 .12 .6 .9 SMO 1.1 96 APR 4 1638 24.22 37 39.97 118 52.35 4.80 11 .06 .4 .8 DOM 1.3 96 APR 4 1703 27.49 37 37.66 118 51.18 8.52 19 .09 .5 .6 SMO 1.6 96 APR 4 1705 13.96 37 38.46 118 51.50 2.21 13 .11 .4 .5 SMO 1.3 96 APR 4 1716 1.54 37 37.00 118 51.28 9.15 15 .05 .5 .5 SMO 1.4 96 APR 4 1725 0.47 37 37.56 118 51.57 3.81 17 .07 .4 .5 SMO 2.1 96 APR 4 1727 52.72 37 37.58 118 52.32 6.67 13 .10 .7 .7 SMO 1.4 96 APR 4 1750 51.80 37 37.00 118 52.26 5.19 12 .06 .5 .8 SMO 1.6 96 APR 4 1818 35.97 37 37.55 118 53.06 6.19 25 .13 .4 .6 SMO 2.2 96 APR 4 1845 32.83 37 38.71 118 52.86 6.71 10 .10 .6 .9 SMO 1.0 96 APR 4 1942 44.42 37 36.96 118 51.35 9.32 15 .08 .6 .6 SMO 1.4 96 APR 4 1955 31.43 37 39.21 118 51.57 0.60 11 .30 .6 .9 DOM * 1.2 96 APR 4 2040 45.97 37 38.64 118 51.58 12.50 11 .09 .8 1.2 SMO 1.6 96 APR 4 2102 7.43 38 49.17 122 47.82 3.85 8 .03 .3 .7 GEY 1.4 96 APR 4 2124 48.52 37 38.06 118 53.19 8.41 19 .10 .5 .6 SMO 2.3 96 APR 4 2135 14.03 38 49.37 122 47.79 3.86 8 .02 .4 .8 GEY 1.1 96 APR 4 2156 51.27 38 47.23 122 45.39 1.17 10 .05 .3 .7 GEY 1.8 96 APR 4 2200 37.87 37 38.03 118 55.35 8.31 13 .06 .4 .7 SMO 1.7 96 APR 4 2202 30.78 37 38.21 118 54.86 9.12 9 .07 .7 1.6 SMO 1.1 --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 96 APR 4 2217 22.47 37 27.71 118 35.76 11.79 19 .07 .4 1.0 RVL 1.4 96 APR 4 2225 4.52 37 37.57 118 52.42 7.19 13 .06 .4 .6 SMO 1.6 96 APR 4 2242 25.56 37 37.44 118 52.34 7.42 13 .06 .4 .7 SMO 1.7 96 APR 4 2250 14.81 37 37.51 118 52.43 6.85 13 .06 .4 .7 SMO 1.6 96 APR 4 2321 32.45 40 44.93 124 15.93 22.45 21 2 .06 .5 .6 EUR 2.8 96 APR 4 2329 56.81 40 44.97 124 16.09 22.41 17 2 .05 .5 .7 EUR 2.6 96 APR 4 2354 28.41 40 45.09 124 16.05 22.12 15 2 .04 .4 .5 EUR 2.5 96 APR 5 4 20.16 37 39.01 118 52.12 7.41 9 .13 .6 .9 DOM 1.1 96 APR 5 14 58.04 40 44.92 124 15.80 22.50 22 2 .07 .4 .6 EUR 3.0 96 APR 5 20 15.00 37 37.04 118 52.18 0.04 7 .25 .9 1.4 SMO * 1.1 96 APR 5 130 46.96 37 37.46 118 52.02 3.74 18 .11 .4 .7 SMO 2.1 96 APR 5 134 1.12 37 16.79 119 57.07 19.08 18 3 .22 .5 .9 KAI 2.4 96 APR 5 200 57.12 37 37.25 118 52.77 6.71 19 .08 .4 .5 SMO 2.0 96 APR 5 205 42.09 37 37.98 118 53.27 5.54 8 .03 .9 .7 SMO 1.1 96 APR 5 231 59.17 37 36.81 118 50.84 6.22 17 .11 .4 .5 SMO 1.9 96 APR 5 254 29.39 37 36.83 118 51.19 5.73 15 .05 .4 .4 SMO 1.9 96 APR 5 302 15.69 37 37.65 118 51.45 7.29 21 .09 .4 .5 SMO 2.1 96 APR 5 324 46.42 37 34.67 118 51.41 8.05 12 .10 .9 1.0 MOR 1.8 96 APR 5 435 29.26 37 37.89 118 50.76 7.94 12 .11 .6 1.0 HCF 1.7 96 APR 5 442 2.45 36 42.65 121 9.71 0.86 16 .21 .9 5.6 PAI 1.7 96 APR 5 454 20.62 39 9.29 123 10.09 3.56 7 .05 .6 6.8 MAA - 1.6 96 APR 5 459 2.95 37 37.03 118 52.01 5.59 7 .06 .9 2.3 SMO 1.1 96 APR 5 530 32.89 37 37.10 118 51.42 9.58 18 .09 .5 .7 SMO 1.8 96 APR 5 542 34.38 37 36.71 118 50.67 3.89 12 .05 .4 .7 SMO 1.8 96 APR 5 544 47.65 37 37.43 118 51.28 8.93 16 .06 .4 .6 SMO 1.8 96 APR 5 634 21.72 37 37.60 118 52.74 5.67 13 .07 .4 .6 SMO 1.6 96 APR 5 646 20.73 37 37.10 118 49.71 6.01 9 .03 .5 1.3 HCF 1.5 96 APR 5 723 51.60 37 38.95 118 49.58 7.27 12 .05 .4 .8 HCF 1.4 96 APR 5 821 27.55 37 37.99 118 52.49 5.87 8 .14 1.0 1.1 SMO 1.4 96 APR 5 841 12.46 37 38.24 118 52.99 7.30 7 .03 .8 1.3 SMO 1.0 96 APR 5 914 40.17 37 36.88 118 50.99 2.49 10 .03 .3 .9 SMO 1.4 96 APR 5 931 4.04 40 39.89 122 14.64 25.12 8 .03 .5 1.4 SHA 1.9 96 APR 5 938 5.40 38 48.82 122 48.33 2.94 10 .06 .3 1.0 GEY 1.5 96 APR 5 939 52.03 37 37.66 118 52.93 5.84 11 .05 .5 .7 SMO 1.1 96 APR 5 958 40.42 37 37.29 118 52.07 6.08 13 .07 .5 .6 SMO 2.0 96 APR 5 1013 12.20 38 48.83 122 48.26 3.39 10 .03 .3 .7 GEY 1.5 96 APR 5 1015 9.40 37 37.68 118 52.05 7.52 9 .02 .8 .7 SMO 1.1 96 APR 5 1026 56.77 37 37.21 118 51.90 6.97 9 .06 .8 1.3 SMO 1.0 96 APR 5 1043 37.12 40 45.12 124 15.74 21.86 24 2 .07 .4 .5 EUR 3.5 96 APR 5 1051 23.00 37 40.55 118 56.82 2.36 7 .42 2.4 3.2 SMO 1.0 96 APR 5 1100 15.16 37 37.37 118 51.14 6.97 10 .05 .5 .7 SMO 1.2 96 APR 5 1119 31.62 37 37.16 118 51.23 9.54 16 .13 .6 .8 SMO 1.9 96 APR 5 1120 16.94 38 47.46 122 48.16 4.22 7 .02 .4 .9 GEY 1.0 96 APR 5 1202 5.51 38 57.35 123 2.46 1.87 10 .08 .4 7.4 MAA 1.5 96 APR 5 1240 45.21 37 38.29 118 54.74 3.09 7 .05 .7 .5 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 96 APR 5 1243 52.07 37 37.62 118 52.72 6.24 10 .05 .5 .8 SMO 1.1 96 APR 5 1304 14.48 36 35.66 121 11.46 2.94 21 .06 .2 .5 PIN 2.1 96 APR 5 1355 56.84 37 37.15 118 52.35 4.34 9 .04 .4 .7 SMO 1.2 96 APR 5 1408 52.77 37 38.41 118 56.03 7.98 11 .08 .6 1.2 SMO 1.1 96 APR 5 1431 57.03 37 39.03 118 53.91 9.61 10 .06 1.1 1.3 DOM 1.2 96 APR 5 1436 39.96 37 38.16 118 56.72 7.41 8 .07 .7 1.3 SMO 1.0 96 APR 5 1510 51.72 37 37.74 118 52.86 7.27 10 .12 .8 1.0 SMO 1.3 96 APR 5 1543 24.70 37 37.40 118 50.92 8.02 7 .11 1.0 1.3 SMO 1.0 96 APR 5 1607 28.39 38 49.89 122 50.27 0.88 7 .10 .5 1.0 GEY 1.1 96 APR 5 1630 14.50 37 37.84 118 51.57 6.98 9 .05 .8 1.1 SMO 1.0 96 APR 5 1637 45.37 37 37.62 118 51.08 7.38 12 .10 .6 .9 SMO 1.4 96 APR 5 1829 10.58 37 37.01 118 51.54 6.01 14 .05 .4 .5 SMO 1.4 96 APR 5 1829 37.63 37 38.17 118 50.61 8.26 7 .02 1.1 1.8 HCF 1.0 96 APR 5 1931 11.21 40 24.80 125 23.32 3.17 39 .16 3.115.3 MEN - 3.8 96 APR 5 2027 15.94 38 49.32 122 47.96 4.16 9 .03 .3 .8 GEY 1.5 96 APR 5 2052 17.42 37 37.19 118 51.34 9.12 23 .06 .4 .6 SMO 2.3 96 APR 5 2053 2.61 37 36.21 118 50.46 11.44 8 .05 1.5 2.7 SMO 1.2 96 APR 5 2121 41.90 37 37.99 118 52.00 7.88 10 .07 .7 1.3 SMO 1.2 96 APR 5 2157 23.85 37 38.54 118 56.89 7.64 10 .06 .5 1.1 SMO 1.2 96 APR 5 2205 41.38 37 37.65 118 51.55 6.63 12 .04 .6 .6 SMO 1.2 96 APR 5 2219 27.34 38 49.24 122 48.16 4.75 16 .05 .2 .8 GEY 2.1 96 APR 5 2224 58.89 39 30.50 122 1.99 20.81 81 1 .31 .4 .8 SAC 3.4 96 APR 5 2304 46.35 37 38.45 118 56.86 7.04 14 .10 .5 .7 SMO 1.8 96 APR 6 5 50.68 37 37.14 118 52.08 4.82 9 .04 .4 .8 SMO 1.1 96 APR 6 26 30.12 37 37.50 118 52.87 6.80 14 .08 .5 .7 SMO 1.6 96 APR 6 46 56.58 37 37.69 118 51.95 5.52 10 .09 .5 .9 SMO 1.5 96 APR 6 145 2.76 37 37.88 118 51.21 8.16 13 .11 .5 .7 SMO 1.7 96 APR 6 146 28.43 37 37.95 118 51.09 7.46 13 .11 .5 .7 SMO 1.4 96 APR 6 258 26.56 37 38.84 118 56.08 6.34 7 .02 .6 1.2 SMO 1.2 96 APR 6 259 57.44 37 37.13 118 50.12 4.80 9 .04 .5 1.0 HCF 1.2 96 APR 6 352 53.71 37 37.36 118 52.61 7.06 20 .12 .5 .6 SMO 2.0 96 APR 6 418 57.19 37 25.08 118 26.93 8.77 7 .02 .7 1.1 CHA 1.4 96 APR 6 421 29.70 37 37.60 118 51.20 8.20 11 .09 .9 .9 SMO 1.3 96 APR 6 451 31.33 40 18.46 124 32.39 11.48 16 1 .10 1.2 .5 MEN 2.5 96 APR 6 453 55.49 38 48.10 122 46.23 1.69 9 .05 .3 .6 GEY 1.2 96 APR 6 544 22.77 37 37.94 118 50.94 8.75 16 .10 .6 .7 SMO 1.8 96 APR 6 548 34.09 37 38.02 118 51.11 8.15 15 .07 .4 .6 SMO 1.7 96 APR 6 554 53.64 36 42.41 121 20.62 3.13 16 .07 .3 .5 STN 1.4 96 APR 6 556 3.47 36 42.36 121 20.71 3.28 13 .05 .3 .5 STN 1.2 96 APR 6 557 20.28 37 37.07 118 51.73 6.53 10 .06 1.0 1.1 SMO 1.2 96 APR 6 706 37.35 37 37.43 118 53.18 5.62 13 .07 .4 .6 SMO 1.3 96 APR 6 722 36.56 37 37.72 118 51.99 6.11 9 .07 .7 1.2 SMO 1.0 96 APR 6 758 28.61 37 38.22 118 52.85 7.39 9 .06 .8 1.2 SMO 1.1 96 APR 6 1036 13.40 37 37.74 118 50.73 8.30 10 .09 .8 1.0 SMO 1.1 96 APR 6 1042 40.75 37 39.71 118 59.64 0.74 7 .25 .5 .8 MAM 1.1 --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 96 APR 6 1104 0.97 37 36.98 118 51.69 3.61 12 .05 .4 .8 SMO 1.4 96 APR 6 1109 14.47 37 35.54 118 50.11 10.56 17 .10 .5 .6 MOR 1.4 96 APR 6 1234 1.72 37 37.83 118 52.92 8.07 11 .10 .7 1.0 SMO 1.1 96 APR 6 1248 22.72 37 37.71 118 52.94 5.84 15 .07 .4 .5 SMO 1.9 96 APR 6 1348 9.28 38 49.32 122 48.38 3.97 16 .04 .2 .6 GEY 2.0 96 APR 6 1416 0.62 37 40.44 118 51.20 1.83 8 .08 .5 .9 DOM 1.4 96 APR 6 1433 39.74 37 38.32 118 56.61 7.54 16 .11 .5 .7 SMO 1.7 96 APR 6 1506 22.24 37 37.07 118 50.99 7.19 16 .05 .4 .5 SMO 1.7 96 APR 6 1525 25.50 37 36.85 118 51.12 9.49 11 .04 .7 1.0 SMO 1.3 96 APR 6 1601 11.48 37 38.09 118 57.15 7.73 13 .16 .7 1.2 SMO 1.8 96 APR 6 1702 33.16 37 37.81 118 49.89 11.30 7 .06 1.4 2.4 HCF 1.0 96 APR 6 1843 21.74 37 37.12 118 51.29 11.13 11 .20 1.4 1.8 SMO 1.2 96 APR 6 1939 38.42 37 29.04 121 45.52 5.74 12 .04 .3 .8 ALU 1.2 96 APR 6 2308 13.76 39 25.01 119 57.88 8.99 34 1 .17 .5 1.1 WAK 2.9 96 APR 7 329 5.23 37 38.67 118 51.74 2.70 12 .17 1.0 1.6 SMO 1.6 96 APR 7 548 52.36 38 47.10 122 45.36 1.50 7 .01 .3 .9 GEY 1.2 96 APR 7 559 10.26 38 49.33 122 47.71 3.76 9 .02 .3 .6 GEY 1.4 96 APR 7 612 24.24 39 24.78 119 57.89 8.96 32 1 .17 .6 1.2 WAK 2.8 96 APR 7 620 17.11 38 46.50 122 44.65 2.53 8 .04 .3 .9 GEY 1.4 96 APR 7 711 28.18 37 38.10 118 52.25 7.65 8 .11 1.6 1.0 SMO 1.2 96 APR 7 738 13.26 37 37.29 118 51.78 9.76 18 .06 .4 .5 SMO 1.9 96 APR 7 752 8.27 38 47.49 122 45.37 1.68 8 .04 .3 .8 GEY 1.4 96 APR 7 811 47.33 37 40.65 118 51.38 5.72 8 .03 .8 1.4 DOM 1.2 96 APR 7 831 48.36 37 37.98 118 52.86 8.08 10 .12 1.2 .8 SMO 1.1 96 APR 7 835 19.32 37 37.06 118 51.76 2.94 11 .05 .4 1.0 SMO 1.5 96 APR 7 845 48.07 37 39.25 118 52.86 8.35 7 .07 .9 3.1 DOM 1.1 96 APR 7 943 0.73 37 35.70 118 52.18 1.91 11 .04 .4 .8 MOR 1.6 96 APR 7 1017 28.83 37 37.58 118 52.33 8.88 10 .06 .6 .8 SMO 1.1 96 APR 7 1036 46.68 37 38.01 118 51.91 9.70 11 .10 .8 1.3 SMO 1.3 96 APR 7 1050 37.02 37 37.95 118 51.38 5.27 7 .08 .7 1.6 SMO 1.2 96 APR 7 1110 29.21 38 50.50 122 49.21 2.06 7 .03 .4 .9 GEY 1.2 96 APR 7 1135 17.10 37 38.06 118 52.53 6.73 9 .05 .6 1.2 SMO 1.3 96 APR 7 1136 59.44 37 37.30 118 52.67 5.14 12 .06 .4 .6 SMO 1.3 96 APR 7 1150 57.12 37 37.33 118 51.10 7.06 10 .12 .9 1.0 SMO 1.3 96 APR 7 1304 37.64 38 47.56 122 45.40 2.16 7 .03 .3 .9 GEY 1.2 96 APR 7 1309 36.43 37 37.66 118 52.91 7.60 12 .05 .5 .7 SMO 1.2 96 APR 7 1503 14.22 38 49.25 122 47.95 0.37 8 .07 .3 .9 GEY 1.0 96 APR 7 1530 20.52 37 28.98 118 23.51 9.70 30 2 .10 .5 .9 CHV 2.7 96 APR 7 1550 43.17 37 37.36 118 52.24 6.25 11 .05 .5 .9 SMO 1.3 96 APR 7 1632 22.55 37 38.83 118 52.47 6.56 7 .05 .7 1.2 SMO 1.0 96 APR 7 1650 14.25 37 31.14 118 48.76 5.23 24 .06 .3 1.2 MOR 2.3 96 APR 7 1819 51.08 37 37.72 118 47.88 4.29 8 .04 .9 .9 HCF 1.5 96 APR 7 1822 49.04 37 34.32 118 50.80 7.18 20 .07 .3 .6 MOR 1.9 96 APR 7 1949 38.22 37 38.72 118 56.51 8.40 10 .09 .8 1.2 SMO 1.2 96 APR 7 1958 46.42 37 37.56 118 52.58 5.76 12 .13 .9 .7 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 96 APR 7 2010 48.83 37 28.00 118 37.79 11.05 11 .05 .4 1.4 RVL 1.5 96 APR 7 2148 32.34 37 37.85 118 50.91 6.63 9 .06 .6 1.2 SMO 1.1 96 APR 7 2210 3.34 38 47.59 122 44.09 0.79 9 .10 .4 1.3 GEY 2.0 96 APR 7 2244 37.95 40 16.91 124 34.29 18.36 8 .03 2.9 .6 MEN 1.9 96 APR 8 26 48.02 37 37.57 118 52.62 6.03 14 .07 .4 .6 SMO 1.7 96 APR 8 39 15.54 37 37.33 118 52.25 6.78 11 .06 .8 1.0 SMO 1.2 96 APR 8 103 39.75 41 19.15 122 10.99 10.62 10 .23 .9 1.1 SHA 1.7 96 APR 8 137 19.77 37 37.49 118 53.29 6.04 14 .06 .4 .6 SMO 1.8 96 APR 8 202 46.49 37 8.46 121 33.00 2.88 10 .06 .3 .8 CYN 1.0 96 APR 8 221 38.47 37 39.08 118 56.22 8.28 10 .06 .7 1.0 SMO 1.3 96 APR 8 307 5.73 37 37.69 118 52.81 5.44 17 .10 .5 .7 SMO 1.9 96 APR 8 307 52.97 37 37.47 118 52.77 5.28 13 .09 .4 .7 SMO 1.5 96 APR 8 309 48.74 37 37.25 118 52.71 6.54 12 .07 .6 1.0 SMO 1.3 96 APR 8 353 9.58 37 38.04 118 52.86 6.46 11 .09 .5 1.1 SMO 1.2 96 APR 8 402 24.97 37 37.68 118 52.32 4.96 7 .04 .6 1.2 SMO 1.3 96 APR 8 416 9.27 37 37.36 118 51.25 8.04 8 .09 .9 1.3 SMO 1.3 96 APR 8 442 50.66 37 37.62 118 52.98 5.65 11 .05 .4 .5 SMO 1.3 96 APR 8 454 21.86 37 37.52 118 52.57 5.42 12 .12 .7 .9 SMO 1.3 96 APR 8 525 32.82 37 37.88 118 51.07 6.91 11 .10 .5 .7 SMO 1.4 96 APR 8 659 10.14 40 18.28 124 33.45 11.89 11 1 .06 1.3 .5 MEN 1.9 96 APR 8 709 2.42 37 36.61 118 50.94 9.78 11 .03 .8 .9 SMO 1.1 96 APR 8 802 23.93 37 37.12 118 47.08 5.64 11 .10 .5 1.0 EMO 1.4 96 APR 8 834 32.95 37 38.03 118 52.55 5.48 9 .12 .6 1.0 SMO 1.1 96 APR 8 844 21.59 38 48.98 122 47.53 5.52 10 .10 .5 .9 GEY 1.3 96 APR 8 850 24.49 38 47.62 122 48.16 4.71 20 .07 .3 .5 GEY 2.2 96 APR 8 856 12.70 37 38.11 118 56.89 7.80 14 .07 .4 .6 SMO 1.6 96 APR 8 917 13.39 37 37.08 118 51.06 7.77 13 .05 .5 .7 SMO 1.6 96 APR 8 920 45.42 38 47.34 122 46.24 1.63 9 .05 .3 .7 GEY 1.4 96 APR 8 951 1.34 37 37.98 118 52.69 5.72 8 .11 .6 1.0 SMO 1.1 96 APR 8 955 56.66 38 49.44 122 48.32 4.29 8 .03 .4 .8 GEY 1.1 96 APR 8 1134 51.91 35 44.34 120 17.16 5.27 8 .07 .4 1.1 GOL 1.4 96 APR 8 1225 34.31 37 37.85 118 51.89 8.46 10 .08 .7 1.1 SMO 1.2 96 APR 8 1237 46.78 37 37.31 118 50.90 7.20 14 .10 .6 .9 SMO 1.2 96 APR 8 1431 32.03 37 37.01 118 50.97 4.57 22 .07 .3 .5 SMO 2.4 96 APR 8 1446 1.79 37 37.24 118 50.76 3.99 9 .10 .6 .8 SMO 1.5 96 APR 8 1510 27.22 39 27.17 122 56.30 7.58 21 1 .03 .2 .5 BAR 2.2 96 APR 8 1528 42.84 37 37.19 118 49.88 6.09 7 .05 .8 1.3 HCF 1.3 96 APR 8 1552 13.34 37 37.83 118 51.02 8.71 8 .10 1.4 1.3 SMO 1.1 96 APR 8 1800 21.65 38 47.36 122 45.11 3.45 14 .10 .3 1.0 GEY 1.9 96 APR 8 1812 55.68 38 47.45 122 45.48 1.71 8 .03 .3 .8 GEY 1.4 96 APR 8 1852 28.98 37 38.62 118 49.50 8.93 14 .09 .5 .7 HCF 1.9 96 APR 8 1930 57.79 37 38.68 118 49.56 8.87 18 .10 .5 .6 HCF 1.4 96 APR 8 2112 18.73 37 46.09 122 34.41 8.19 11 .06 .3 1.3 SFP 1.8 96 APR 8 2132 53.85 38 48.85 122 47.79 3.85 14 .13 .4 .8 GEY 2.0 --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 96 APR 8 2205 53.92 40 38.89 123 51.93 26.08 14 .09 .4 1.1 EUR 2.5 96 APR 9 27 39.30 37 38.64 118 56.16 7.83 7 .08 .7 1.4 SMO 1.2 96 APR 9 103 33.16 37 38.83 118 49.33 8.16 8 .07 .6 1.0 HCF 1.5 96 APR 9 227 4.07 38 49.08 122 47.86 3.92 10 .02 .3 .7 GEY 1.5 96 APR 9 305 18.68 38 2.84 118 57.62 6.75 20 .13 .5 3.8 MOL 2.4 96 APR 9 336 36.44 37 37.50 118 49.98 11.42 10 .06 1.2 2.1 HCF 1.4 96 APR 9 359 12.72 37 37.50 118 50.46 6.59 7 .06 .6 1.4 HCF 1.1 96 APR 9 415 20.67 37 37.87 118 57.80 8.42 11 .04 .5 1.0 SMO 1.5 96 APR 9 424 12.54 37 39.73 118 51.99 2.46 14 .09 .4 1.0 DOM 1.6 96 APR 9 742 17.02 40 18.04 124 26.57 8.46 16 1 .07 .8 .4 MEN 2.1 96 APR 9 813 57.47 36 57.47 121 34.38 5.60 53 .20 .3 .6 SAR 1.9 96 APR 9 821 13.42 36 32.87 121 8.32 6.50 35 .07 .3 .5 PIN 2.2 96 APR 9 900 45.71 36 36.61 121 6.51 0.78 8 .23 1.0 4.0 BVL * 1.0 96 APR 9 1001 48.35 38 1.26 121 50.10 17.72 8 .03 .7 .4 JQN 1.7 96 APR 9 1055 54.04 38 49.38 122 47.77 5.01 16 .07 .3 .6 GEY 2.0 96 APR 9 1148 24.07 40 48.66 123 24.36 28.09 9 2 .07 .6 1.5 KLA 2.0 96 APR 9 1158 7.15 37 40.85 118 53.17 2.66 7 .11 .8 9.8 DOM - 1.0 96 APR 9 1209 54.75 37 41.12 118 53.42 0.03 8 .09 .6 .6 DOM * 1.1 96 APR 9 1259 8.38 36 32.91 121 8.41 6.30 15 .04 .3 .8 PIN 1.5 96 APR 9 1324 23.38 37 37.62 118 51.23 7.43 8 .09 .7 1.0 SMO 1.1 96 APR 9 1344 27.23 37 36.86 118 51.59 8.94 18 .06 .4 .6 SMO 1.9 96 APR 9 1544 42.71 39 25.08 119 53.14 7.86 31 1 .15 .5 .9 WAK 2.9 96 APR 9 1646 10.21 38 49.15 122 47.70 5.52 17 .08 .3 .6 GEY 2.0 96 APR 9 1732 18.54 37 37.33 118 52.90 4.59 8 .04 .5 .9 SMO 1.4 96 APR 9 1752 22.16 38 47.50 122 45.43 2.00 7 .03 .3 .9 GEY 1.2 96 APR 9 1842 48.72 37 32.44 118 49.68 8.90 19 .06 .3 .9 MOR 2.2 96 APR 9 1845 4.38 37 37.17 118 51.60 6.02 14 .05 .4 .5 SMO 1.8 96 APR 9 1846 6.22 37 37.22 118 51.47 6.11 13 .05 .4 .6 SMO 1.7 96 APR 9 1851 2.23 37 36.89 118 51.80 5.86 11 .06 .6 .6 SMO 1.5 96 APR 9 2049 58.00 37 31.92 118 49.23 8.73 13 .04 .7 .9 MOR 1.5 96 APR 9 2124 46.92 36 28.84 121 3.32 5.67 10 .03 .4 .9 BIT 1.4 96 APR 9 2139 14.00 37 38.43 118 56.74 7.23 10 .06 .5 1.0 SMO 1.4 96 APR 10 5 42.08 37 30.24 118 51.82 3.70 16 .05 .6 1.3 MOR 1.8 96 APR 10 125 39.36 38 47.06 122 45.63 2.15 11 .05 .3 .7 GEY 1.5 96 APR 10 222 19.80 40 17.95 124 28.52 20.49 15 .07 1.7 .3 MEN 2.6 96 APR 10 226 1.86 37 37.73 118 51.68 4.21 10 .07 .7 1.1 SMO 1.5 96 APR 10 246 2.63 37 37.36 118 51.02 6.81 8 .11 .8 1.0 SMO 1.2 96 APR 10 251 23.27 37 37.98 118 51.79 2.88 19 .10 .3 .9 SMO 2.1 96 APR 10 432 53.84 37 36.88 118 51.48 8.79 12 .06 .6 .6 SMO 1.3 96 APR 10 615 3.69 38 49.39 122 47.98 3.91 13 .06 .3 .7 GEY 1.8 96 APR 10 634 24.07 38 2.08 118 45.05 2.03 23 .15 .6 8.2 MOL * 2.4 96 APR 10 737 20.47 36 40.20 121 17.62 4.23 12 .04 .3 .8 STN 1.3 96 APR 10 754 2.76 37 35.69 118 49.34 5.11 12 .10 .6 .6 MOR 1.5 96 APR 10 805 53.40 37 37.25 118 51.59 6.64 12 .06 .7 .6 SMO 1.8 96 APR 10 839 17.78 37 35.80 118 49.31 4.65 8 .11 1.2 1.0 MOR 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 96 APR 10 848 9.87 37 37.93 118 51.33 4.32 9 .07 .5 1.1 SMO 1.1 96 APR 10 950 13.90 37 36.72 118 51.30 5.68 10 .05 .6 .6 SMO 1.3 96 APR 10 1033 37.54 37 39.09 119 26.61 6.89 20 4 .13 .511.6 KAI - 1.8 96 APR 10 1034 29.87 37 37.22 118 50.02 6.13 7 .02 .6 1.6 HCF 96 APR 10 1148 39.63 36 40.19 121 17.68 4.08 11 .05 .3 1.4 STN 1.1 96 APR 10 1416 54.66 37 35.77 118 49.44 2.89 10 .11 1.3 1.2 MOR 1.9 96 APR 10 1633 24.59 37 37.38 118 50.87 7.81 13 .11 .8 .8 SMO 1.6 96 APR 10 1752 39.00 38 48.10 122 48.27 4.52 8 .01 .3 .8 GEY 1.2 96 APR 10 1917 59.05 37 37.21 118 51.79 5.92 10 .12 1.0 .8 SMO 1.4 96 APR 10 1938 27.30 37 38.19 118 52.96 5.72 10 .13 1.3 .9 SMO 1.4 96 APR 10 2002 47.11 37 37.53 118 51.35 7.72 25 .12 .4 .6 SMO 2.5 96 APR 10 2006 21.70 37 37.72 118 51.11 7.28 8 .12 1.3 .9 SMO 1.1 96 APR 10 2012 20.38 37 38.03 118 53.48 10.40 8 .08 1.6 2.0 SMO 1.0 96 APR 10 2114 18.08 38 49.60 122 47.82 5.66 8 .10 .7 1.1 GEY 1.3 96 APR 10 2211 19.97 37 31.83 118 25.63 7.90 10 .03 .4 .7 CHV 1.6 96 APR 11 24 59.91 37 37.33 118 51.34 8.00 24 .07 .4 .5 SMO 2.2 96 APR 11 120 58.10 37 38.17 118 53.13 7.32 10 .06 .4 .7 SMO 1.2 96 APR 11 210 43.87 38 47.16 122 45.33 1.26 10 .04 .3 .8 GEY 1.8 96 APR 11 323 9.06 36 40.24 121 17.60 4.02 23 .05 .2 .7 STN 1.9 96 APR 11 327 57.18 37 39.12 118 53.88 8.81 7 .05 1.2 1.5 DOM 1.5 96 APR 11 454 21.27 38 50.29 122 49.91 0.43 7 .06 .5 1.3 GEY 1.0 96 APR 11 506 25.12 37 16.70 118 50.15 19.83 18 .09 .6 1.7 KAI 2.2 96 APR 11 652 46.21 38 47.44 122 48.24 4.19 21 .11 .3 .6 GEY 2.5 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 ------------------------------------------------------------------------------- APR 02 025516.3* 13.873N 145.369E 33N 5.2 4.1 1.3 37 MARIANA ISLANDS 040406.1* 9.984S 120.037E 33N 4.9 1.2 19 SUMBA REGION, INDONESIA 075926.1 37.808N 26.974E 33N 5.0 5.1 1.3 108 DODECANESE ISLANDS 082556.2& 34.359N 118.658W 14 48 SOUTHERN CALIFORNIA. MD 2.9 084351.2* 43.524N 0.619W 10G 0.6 11 PYRENEES 103702.1% 46.067N 7.052E 5G 1.4 8 SWITZERLAND. ML 2.6 (LDG). 160327.4 27.817N 130.226E 33N 0.8 7 RYUKYU ISLANDS 203533.1* 40.217N 143.736E 33N 4.7 0.7 15 OFF EAST COAST OF HONSHU, JAPAN APR 03 000853.8* 23.043S 66.801W 207* 3.7 0.8 9 JUJUY PROVINCE, ARGENTINA 033713.1* 3.109N 35.925E 10G 4.4 0.8 11 KENYA 060423.6? 37.19 N 138.55 E 186* 3.7 1.0 11 NEAR WEST COAST OF HONSHU, JAPAN 064649.0* 59.514N 152.651W 81* 3.5 1.1 13 SOUTHERN ALASKA 080905.6? 5.59 S 148.97 E 155? 4.0 0.8 9 NEW BRITAIN REGION, P.N.G. 085927.7* 23.688S 177.472W 170D 4.4 0.9 24 SOUTH OF FIJI ISLANDS 095118.7* 1.008S 136.911E 33N 4.2 1.4 13 IRIAN JAYA REGION, INDONESIA 095649.9* 21.354S 68.244W 133D 4.0 1.1 7 CHILE-BOLIVIA BORDER 101511.9* 0.918S 136.230E 33N 4.4 1.5 14 IRIAN JAYA REGION, INDONESIA 123123.4* 51.802N 30.272W 10G 4.0 1.1 9 NORTHERN MID-ATLANTIC RIDGE 130434.4 40.751N 15.463E 10G 4.6 1.1 72 SOUTHERN ITALY 172637.6 1.141N 120.418E 30D 5.2 4.7 1.2 44 MINAHASSA PENINSULA, SULAWESI 190430.8* 1.083N 120.448E 101? 4.6 1.3 21 MINAHASSA PENINSULA, SULAWESI 201643.6* 3.581N 126.820E 23D 4.4 0.8 16 TALAUD ISLANDS, INDONESIA 210356.9* 6.044S 146.243E 33N 3.5 1.2 7 EASTERN NEW GUINEA REG., P.N.G. 222231.0 51.731N 15.909E 10G 1.4 10 POLAND 230047.2 14.496N 93.479W 33N 5.0 4.3 1.2 94 NEAR COAST OF CHIAPAS, MEXICO APR 04 001900.9* 5.387S 147.247E 146D 4.5 1.3 13 EASTERN NEW GUINEA REG., P.N.G. 002405.3 51.710N 168.148W 46D 4.1 1.1 24 FOX ISLANDS, ALEUTIAN ISLANDS 003402.1 23.477S 177.781W 400G 4.3 0.6 30 SOUTH OF FIJI ISLANDS 010000.5* 58.432N 154.617W 33N 3.1 1.5 18 ALASKA PENINSULA 013203.6* 43.453N 147.788E 43D 3.9 1.3 16 KURIL ISLANDS 041845.9* 9.239N 77.835W 33N 4.3 1.2 29 NEAR NORTH COAST OF COLOMBIA 043655.9? 44.79 N 149.51 E 33N 3.9 1.3 12 KURIL ISLANDS 051507.3 65.074N 146.108W 5G 0.7 54 NORTHERN ALASKA. ML 3.5 (AEIC), 3.8 (PMR). Felt at Chena Hot Springs. 054000.8? 23.45 N 108.51 W 10G 3.8 1.5 17 GULF OF CALIFORNIA 071125.6* 44.470N 149.724E 45D 4.2 1.1 32 KURIL ISLANDS 093811.1 24.453N 123.513E 33N 3.5 1.0 9 SOUTHWESTERN RYUKYU ISLANDS 111516.0 3.064N 126.254E 51* 5.1 1.1 25 TALAUD ISLANDS, INDONESIA 112612.0 3.112N 126.357E 33N 4.5 0.8 18 TALAUD ISLANDS, INDONESIA 131026.3 2.992N 126.178E 41? 4.9 1.2 28 NORTHERN MOLUCCA SEA 141127.4* 51.026N 178.749E 16D 4.0 1.2 20 RAT ISLANDS, ALEUTIAN ISLANDS 144538.8 47.954N 153.505E 126* 4.0 0.7 24 KURIL ISLANDS 171417.0? 16.67 S 72.43 W 103D 4.2 1.3 14 NEAR COAST OF PERU 190011.9 35.264N 27.070E 33N 3.8 0.6 21 DODECANESE ISLANDS 194118.2* 34.016S 70.485W 90G 0.2 9 CHILE-ARGENTINA BORDER 205102.9% 31.975S 68.978W 190G 0.3 10 SAN JUAN PROV., ARGENTINA. MD 3.8 210145.8? 51.43 N 179.79 W 97* 3.9 1.1 14 ANDREANOF ISLANDS, ALEUTIAN IS. 224526.8 51.432N 178.816W 33N 3.9 0.7 12 ANDREANOF ISLANDS, ALEUTIAN IS. 230306.4? 29.56 N 80.54 E 33N 3.6 1.1 9 NEPAL-INDIA BORDER 232134.0 40.920N 123.915W 10G 0.7 10 NORTHERN CALIFORNIA. ML 2.9 (BRK). Felt at Eureka. 235310.3* 45.440N 148.545E 33N 3.9 1.3 17 KURIL ISLANDS APR 05 010907.7 45.233N 150.210E 33N 4.9 0.6 46 KURIL ISLANDS 104336.6 40.751N 124.214W 20G 0.8 28 NEAR COAST-NORTHERN CALIF. ML 3.4 193110.8 40.432N 125.394W 10G 3.8 0.8 33 OFF COAST-NORTHERN CALIF. ML 3.8 201224.6 35.351N 140.370E 33N 5.2 1.1 13 NEAR EAST COAST OF HONSHU, JAPAN 222458.0 39.517N 122.082W 20G 0.8 29 NORTHERN CALIFORNIA. ML 3.3 APR 06 040433.2 10.191N 125.943E 33N 5.0 4.5 1.1 61 LEYTE, PHILIPPINE ISLANDS 091849.4 10.277S 75.189W 33N 5.0 0.8 62 CENTRAL PERU 093045.3* 11.174S 165.728E 33N 4.5 1.0 23 SANTA CRUZ ISLANDS 125342.8* 34.551N 24.027E 10G 4.7 1.2 15 CRETE. ML 4.4 (THE). Felt in southwestern Crete and at Khania. 213053.9 79.637N 3.887E 10G 4.5 1.1 47 GREENLAND SEA 220441.1 44.267N 148.966E 33N 5.3 5.4 0.8 53 KURIL ISLANDS 230814.8 39.372N 120.101W 10G 0.6 25 NORTHERN CALIFORNIA. MD 2.7 233506.5* 44.195N 149.109E 33N 5.0 1.2 22 KURIL ISLANDS APR 07 000725.4 44.369N 149.286E 33N 5.3 5.1 0.7 69 KURIL ISLANDS 005256.3 44.416N 148.094E 33N 4.8 0.6 20 KURIL ISLANDS 043119.9* 51.983N 30.296W 10G 4.6 0.6 17 NORTHERN MID-ATLANTIC RIDGE 055802.2 44.287N 149.153E 33N 5.2 5.0 0.8 60 KURIL ISLANDS 060204.4 44.284N 149.166E 33N 5.1 0.7 42 KURIL ISLANDS 060909.9 44.308N 149.151E 33N 5.1 0.7 43 KURIL ISLANDS 131714.0& 45.360N 121.700W 6 9 WASHINGTON-OREGON BORDER. MD 2.9 141859.1* 53.290N 159.835E 51D 5.3 0.9 66 NEAR EAST COAST OF KAMCHATKA 154541.8* 27.899N 141.678E 33N 4.7 0.6 17 BONIN ISLANDS REGION 180815.4 34.301N 118.702W 10G 0.7 49 SOUTHERN CALIFORNIA. ML 3.0 183401.1 42.181N 124.452W 20G 0.9 20 NEAR COAST OF OREGON. ML 3.5 (GS), MD 3.3 (SEA). Felt at Gold Beach. APR 08 000449.6* 26.028N 140.046E 300G 4.6 0.6 32 BONIN ISLANDS REGION 152049.1 34.369N 116.483W 10G 0.6 24 SOUTHERN CALIFORNIA. ML 2.8 164942.2 6.205S 154.634E 57D 5.6 0.6 56 SOLOMON ISLANDS. Mw 5.9 (GS) 165508.5 14.993N 61.491W 189D 5.0 0.7 42 WINDWARD ISLANDS 183651.0* 52.258N 30.174W 10G 4.7 0.9 14 NORTHERN MID-ATLANTIC RIDGE 203630.5 34.379N 116.551W 10G 0.5 8 SOUTHERN CALIFORNIA. ML 2.7 (GS). Felt. 204638.6* 10.535S 161.492E 60D 5.3 0.6 41 SOLOMON ISLANDS 234640.6 34.386N 116.479W 10G 0.8 44 SOUTHERN CALIFORNIA. ML 3.9 (GS). Felt in the epicentral area. APR 09 020443.0* 32.387S 69.095W 120D 4.3 0.6 15 MENDOZA PROVINCE, ARGENTINA 024807.2 43.044N 103.968W 5G 0.8 9 SOUTH DAKOTA. mbLg 3.7 (GS). 030012.6* 16.174N 98.633W 33N 4.7 0.8 32 NEAR COAST OF GUERRERO, MEXICO 074851.2* 44.179N 128.722W 20G 4.1 1.6 23 OFF COAST OF OREGON APR 11 112425 Q 10.8 S 161.2 E 33N 5.8 0.8 79 SOLOMON ISLANDS Note: Computer users can get faster access to the Weekly Seismicity Reports in any of three ways: 1. World-Wide-Web (WWW) access: http://quake.wr.usgs.gov 2. Anonymous FTP access: quake.wr.usgs.gov (in pub/www/QUAKES/WEEKREPS) 3. Email Access: (send email to michael@andreas.wr.usgs.gov) Notes for Table 1: 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.