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 May 15 - 21, 1997 Stephen R. Walter U.S. Geological Survey 345 Middlefield Rd. MS-977, Menlo Park, CA 94025 San Francisco Bay Area During the seven day period ending at midnight on Wednesday, May 21, 1997 the U.S. Geological Survey office in Menlo Park recorded 27 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. Eight were as large as M2. This total compares to 16 earthquakes during the prior seven day period (May 8 - 14), only two of which were as large as M2. All M2 earthquakes occurred in the southern part of the Bay Area, primarily along the creeping segments of the San Andreas and Calaveras faults. San Andreas activity consisted of a pair of M2's last Thursday morning just west of San Juan Bautista (#1/1) and a M2.6 Tuesday afternoon about five miles northwest of the town (#3/1). The Calaveras saw a trio of M2's about nine miles southeast of Hollister (#2/1) and a M2.1 Wednesday night about two miles south of the town (#4/1). The only other notable earthquake was a 21-km-deep M2.5 that occurred in the southern Santa Cruz Mountains about four miles west of Felton (#5/1). It was reported felt in the Bonny Doon area. Northern & Central California It was a relatively quiet week with no earthquakes as large as M3. Activity continued in the area northeast of Red Bluff with M2.3 last Thursday evening about 11 miles northeast of Red Bluff (#2/2) and a M2.9 and a M2.6 Sunday morning both about 20 miles east-northeast of Red Bluff (#6/2). Activity in the Cape Mendocino area included a 24-km-deep events beneath the Klamath Mountains about 26 miles west of Hayfork (#5/2) and a M2.2 on the Mendocino fracture zone about 42 miles west of Petrolia (#8/2). Aside from a few small events at the Geysers, there were no earthquakes as large as M2 in the Coast Ranges south of the Cape. Activity in central California included two M2 events on the creeping segment of the San Andreas, the first a M2.8 about seven miles northwest of Parkfield (#7/2), the second a M2.4 about four miles north of the Pinnacles (#9/2). The Coalinga area experienced three M2 earthquakes, the largest a M2.3 Wednesday evening about eight miles northwest of the town (#4/2). Other events of note include a pair of small M2's in the central Sierra Nevada, 27 and 39 miles respectively southeast of Yosemite Village (#1/2), and a pair of M2's east of Mono Lake (#3/2). Long Valley Caldera The only M2 earthquake in the vicinity of the caldera was a M2.1 just before noon on Tuesday that occurred beneath the southern rim of the caldera about five miles southeast of Mammoth Lakes (#3/3). Activity south of the caldera included four M2 events near the central part of the Hilton Creek fault (#1/3), a M2.5 just a bit farther to the southwest (#2/3), and a M2.0 east of the Round Valley fault about 13 miles west of Bishop (#4/3) USA Seismicity (May 12 - 21) According to data provided by the National Earthquake Information Center there were only two notable earthquakes in the lower 48 states outside of California. Last Thursday evening a M4.4 occurred in a remote part of northeastern Nevada about 50 miles southeast of Elko (#1/4). On Monday afternoon a M2.9 occurred in northeastern Georgia, near the Alabama and Tennessee borders (#3/4). Activity on note in southern California included a M3.0 that was felt near the Los Angeles INternational Airport. The Planet Earth (May 12 - 21) Only one large earthquake occurred on the planet during the week. This M6.1 quake occurred in central India near the city of Jabalpur (#3/5). Early reports claimed at least 35 people were killed and hundreds more were injured. A M5.3 in Albania damaged some houses in the Lake Ohrid area and was felt as far away as Edhessa and Kastoria, Greece (#1/5). A M5.6 in northern Chile was strongly felt at Copiapo and less strongly at El Salvador, Inca de Oro and Petrerillos (#2/5). 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 97 MAY 15 842 36.64 37 22.10 119 28.41 6.47 10 1 .17 1.013.6 KAI - 2.0 97 MAY 15 1033 54.86 37 32.77 118 49.76 6.37 9 .01 3.1 3.2 MOR 1.2 97 MAY 15 1105 33.86 38 46.88 122 44.93 3.90 7 .02 .3 1.2 GEY 1.2 97 MAY 15 1130 45.91 39 33.69 123 22.11 7.94 10 .07 .3 1.3 MAA 1.2 97 MAY 15 1558 3.07 37 27.07 121 32.61 5.84 7 .01 .7 1.7 HAM 1.0 97 MAY 15 1618 46.95 38 48.26 122 46.76 4.74 8 .02 .4 1.2 GEY 1.2 97 MAY 15 1645 10.13 36 50.75 121 34.48 5.98 62 1 .11 .2 .3 SJB 2.7 97 MAY 15 1650 27.48 37 52.44 121 50.45 21.04 8 .25 3.1 5.3 GRN 1.5 97 MAY 15 1822 37.49 36 50.85 121 34.52 6.28 47 1 .09 .2 .3 SJB 2.1 97 MAY 15 1852 33.84 40 8.51 123 51.14 22.83 12 2 .05 .5 .3 MEN 1.6 97 MAY 15 1908 47.01 37 32.67 118 49.69 6.67 10 2 .03 .6 .8 MOR 1.0 97 MAY 15 1941 4.94 38 48.35 122 45.26 1.57 13 .02 .2 .5 GEY 1.8 97 MAY 16 146 36.71 38 51.32 122 47.61 1.23 9 .03 .3 .9 GEY 1.5 97 MAY 16 153 50.36 38 48.61 122 46.14 3.00 9 .02 .3 .6 GEY 1.5 97 MAY 16 504 47.15 38 49.18 122 46.53 2.28 20 .05 .2 .4 GEY 1.9 97 MAY 16 554 14.44 40 17.78 122 5.48 14.15 11 .04 .2 .7 SHA 2.3 97 MAY 16 728 55.59 37 54.68 118 48.24 11.48 31 .12 .7 1.2 MOL 2.4 97 MAY 16 836 55.70 37 17.79 121 40.46 2.34 21 2 .05 .2 .6 SFL 1.5 97 MAY 16 854 27.40 37 17.70 121 40.55 3.14 66 3 .05 .1 .3 SFL 1.9 97 MAY 16 1054 25.78 38 48.19 122 46.82 1.48 7 .01 .3 2.4 GEY 1.4 97 MAY 16 1242 13.59 37 17.83 121 40.53 3.33 9 .04 .5 1.8 SFL 1.1 97 MAY 16 1328 16.94 39 20.47 123 14.95 7.70 22 1 .04 .2 .8 MAA 1.7 97 MAY 16 1518 17.42 38 49.32 122 48.59 4.29 8 .02 .3 .8 GEY 1.0 97 MAY 16 1533 43.18 36 0.73 120 34.19 3.32 9 .03 .5 1.4 SLA 1.6 97 MAY 16 1544 26.42 38 2.14 118 42.30 2.32 18 1 .05 1.0 1.5 MOL 1.8 97 MAY 16 1557 31.10 36 0.75 120 34.29 4.02 16 2 .03 .3 .6 SLA 1.6 97 MAY 16 2029 54.60 37 39.51 118 53.73 6.67 11 1 .02 .5 .8 DOM 1.3 97 MAY 16 2258 32.36 38 47.77 122 48.52 4.29 19 .03 .2 .4 GEY 1.9 97 MAY 16 2313 3.82 37 31.90 118 43.34 10.40 18 2 .02 .3 1.0 WCN 1.2 97 MAY 16 2339 34.04 37 29.24 121 37.18 6.30 20 2 .04 .2 .4 HAM 1.2 97 MAY 17 5 33.14 36 19.31 120 31.10 14.73 13 .03 .3 .9 COA 1.7 97 MAY 17 13 19.57 37 36.71 119 1.39 11.22 12 .03 .8 1.6 MAM 1.1 97 MAY 17 21 38.23 36 19.21 120 30.84 16.66 28 .06 .2 .3 COA 2.1 97 MAY 17 36 44.38 38 48.48 122 45.20 1.22 16 .05 .2 .5 GEY 1.7 97 MAY 17 50 11.66 40 18.18 124 29.91 8.38 8 2 .05 1.3 .8 MEN 1.7 97 MAY 17 359 18.22 38 49.90 122 51.61 1.83 19 1 .05 .2 .6 GEY 1.6 97 MAY 17 517 16.35 36 38.39 121 15.37 5.85 23 2 .04 .2 .6 STN 1.3 97 MAY 17 537 10.04 37 32.92 118 1.27 0.05 7 1 .06 4.0 3.0 WHI # 1.9 97 MAY 17 704 10.02 38 50.20 122 52.67 3.50 37 2 .07 .1 .5 GEY 2.0 97 MAY 17 705 49.64 38 49.97 122 52.82 2.15 14 .03 .2 .6 GEY 1.7 97 MAY 17 746 40.51 37 37.17 118 51.14 5.01 13 .03 .3 .5 SMO 1.5 97 MAY 17 1013 27.08 38 1.75 118 43.06 1.16 27 1 .05 .4 1.7 MOL 2.0 97 MAY 17 1221 19.09 40 30.38 123 40.14 23.69 11 .04 .3 .5 EUR 2.4 97 MAY 17 1236 45.91 37 24.99 118 34.02 13.66 9 1 .03 1.9 3.6 RVL 1.5 97 MAY 17 1413 46.16 37 31.39 118 46.95 6.16 26 2 .05 .3 .7 MOR 2.1 --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 97 MAY 17 1444 49.44 37 31.32 118 47.03 6.25 26 .05 .3 .8 MOR 2.3 97 MAY 17 1450 11.55 38 49.15 122 47.81 3.78 10 .01 .3 .5 GEY 1.4 97 MAY 17 1515 44.32 37 40.97 118 51.81 7.01 7 .03 2.2 1.5 DOM 1.0 97 MAY 17 1534 49.70 37 36.96 118 52.18 4.96 22 .07 .2 .3 SMO 1.8 97 MAY 17 1709 32.46 36 5.63 120 38.01 3.95 11 .02 .7 .7 SLA 1.6 97 MAY 17 1817 39.76 38 48.68 122 48.99 4.44 29 .03 .2 .3 GEY 2.0 97 MAY 17 2014 51.57 36 2.25 120 35.03 3.66 7 .01 .7 1.2 SLA 1.1 97 MAY 17 2046 27.73 36 58.99 120 57.37 0.66 11 1 .03 1.1 2.0 ORT 1.4 97 MAY 18 0 57.48 37 30.02 118 47.86 10.19 26 .05 .4 .8 MOR 2.5 97 MAY 18 346 57.71 37 30.57 121 52.30 11.18 16 .04 .3 .5 MIS 1.2 97 MAY 18 407 31.96 39 20.54 123 15.02 7.93 26 2 .05 .1 .7 MAA 1.8 97 MAY 18 439 51.22 37 39.30 118 55.85 3.16 9 .03 .4 .7 SMO 1.1 97 MAY 18 717 10.59 36 7.38 118 3.09 6.65 12 1 .05 .6 1.2 WWF 2.1 97 MAY 18 740 4.20 39 20.49 123 15.10 7.55 12 1 .03 .3 .9 MAA 1.4 97 MAY 18 929 24.12 39 35.45 122 2.48 24.28 8 1 .06 1.7 1.2 SAC 1.5 97 MAY 18 929 24.22 38 55.92 123 0.11 4.89 7 1 .01 .5 2.5 MAA 1.2 97 MAY 18 1432 14.17 38 48.77 122 48.77 3.77 7 .01 .4 1.0 GEY 1.0 97 MAY 18 1438 56.32 37 37.04 121 51.06 13.98 8 .01 .7 1.1 DAN 1.8 97 MAY 18 1448 59.17 40 16.85 121 52.07 0.87 13 .20 .613.7 SHA - 2.9 97 MAY 18 1449 6.97 40 16.59 121 52.66 0.37 38 2 .36 .4 1.8 SHA 2.6 97 MAY 18 1518 42.37 37 30.51 118 50.68 16.44 12 .43 2.0 3.6 MOR 1.6 97 MAY 18 1541 55.21 40 16.70 121 53.45 8.74 12 1 .08 .4 1.8 SHA 1.8 97 MAY 18 1643 9.83 40 16.84 121 53.44 9.16 11 .06 .4 1.7 SHA 1.8 97 MAY 18 1716 21.66 37 29.72 121 52.45 2.83 34 2 .06 .1 .4 MIS 1.4 97 MAY 18 1909 40.34 35 59.14 120 32.30 2.61 7 2 .03 .8 7.2 MID - 1.0 97 MAY 18 1925 14.78 36 46.43 121 16.95 8.63 60 1 .05 .1 .2 PAI 2.4 97 MAY 18 1931 26.98 36 46.36 121 16.95 8.34 56 1 .05 .1 .3 PAI 2.2 97 MAY 18 1937 1.06 37 29.64 118 50.58 10.11 7 .03 .8 .9 MOR 1.1 97 MAY 18 2131 26.30 38 46.56 122 44.94 2.37 8 .02 .3 .7 GEY 1.3 97 MAY 18 2223 10.09 38 49.14 122 47.90 3.64 7 .01 .4 .8 GEY 1.2 97 MAY 18 2253 42.57 36 34.50 121 10.18 6.01 28 1 .05 .2 .4 PIN 1.7 97 MAY 19 24 42.76 36 46.29 121 16.91 8.00 49 1 .05 .2 .3 PAI 1.5 97 MAY 19 406 4.99 35 58.88 118 19.04 7.76 11 .08 .4 1.5 WWF 2.0 97 MAY 19 438 12.83 36 41.28 121 19.15 4.63 39 .04 .1 .3 STN 1.7 97 MAY 19 600 40.24 37 31.39 118 46.21 3.39 29 2 .07 .3 1.1 WCN 2.5 97 MAY 19 812 8.24 36 41.29 121 19.12 4.69 35 .04 .2 .3 STN 1.6 97 MAY 19 1437 2.19 38 49.14 122 48.12 3.53 9 .01 .3 .6 GEY 1.2 97 MAY 19 1511 59.91 37 31.24 118 46.13 2.92 19 .05 .3 1.7 WCN 2.0 97 MAY 19 1543 42.82 38 49.16 122 47.98 3.68 8 .02 .4 .6 GEY 1.0 97 MAY 19 1621 23.27 38 48.75 122 48.29 3.48 8 .01 .4 .6 GEY 1.0 97 MAY 20 231 4.45 38 47.67 122 48.02 4.73 39 .04 .1 .3 GEY 2.2 97 MAY 20 443 47.50 37 32.24 118 49.67 7.32 15 2 .03 .4 .7 MOR 1.4 97 MAY 20 922 32.41 37 34.01 121 52.72 9.20 33 1 .04 .1 .3 SUN 1.4 97 MAY 20 1108 27.31 38 40.20 122 43.47 9.08 17 2 .04 .3 .6 NAP 1.5 97 MAY 20 1548 30.14 37 7.83 121 31.77 7.83 17 .02 .3 .5 CYN 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 97 MAY 20 1756 1.27 40 58.26 122 22.91 5.00 7 .02 .7 8.1 SHA - 1.8 97 MAY 20 1825 8.26 37 37.15 118 53.49 2.66 23 .07 .2 .3 SHE 2.1 97 MAY 20 1846 22.36 39 32.68 123 23.49 7.50 10 .04 .3 1.2 MAA 1.6 97 MAY 20 1954 48.48 37 39.34 118 54.08 5.97 7 .01 .9 1.5 DOM 1.0 97 MAY 20 2005 24.72 37 29.47 118 50.40 9.74 8 1 .03 .5 1.1 MOR 1.0 97 MAY 20 2044 24.21 37 38.80 118 55.57 0.02 9 .06 .2 .4 SMO # 1.8 97 MAY 20 2044 24.80 37 38.29 118 54.81 5.26 19 2 .05 .2 .4 SMO 1.5 97 MAY 20 2059 28.81 37 38.55 118 54.62 4.31 9 .04 .4 .8 SMO 1.4 97 MAY 20 2211 17.78 37 36.86 118 53.93 2.38 7 .05 .5 .4 SHE 1.4 97 MAY 20 2215 36.51 36 52.87 121 36.81 7.22 68 1 .09 .1 .2 SJB 2.6 97 MAY 20 2230 54.06 37 38.86 118 54.65 5.16 18 2 .03 .3 .3 SMO 1.5 97 MAY 20 2248 56.00 37 37.18 118 53.39 2.91 22 1 .07 .2 .3 SHE 1.9 97 MAY 21 19 20.41 37 37.24 118 53.40 2.67 9 .05 .4 .4 SMO 1.4 97 MAY 21 243 0.30 38 16.80 119 20.82 1.14 8 1 .10 .9 3.6 WAK 1.8 97 MAY 21 256 32.59 37 27.13 118 35.83 12.42 25 1 .04 .2 .6 RVL 2.0 97 MAY 21 451 37.52 36 34.20 121 6.37 8.42 13 1 .05 .3 .9 BVL 1.0 97 MAY 21 453 33.09 35 58.50 120 31.39 11.25 53 1 .04 .2 .2 MID 2.8 97 MAY 21 859 18.70 36 10.37 120 13.53 10.96 18 2 .02 .2 .5 COA 2.1 97 MAY 21 1107 27.28 36 2.76 120 35.43 4.04 11 1 .03 .6 .7 SLA 1.1 97 MAY 21 1110 44.19 36 58.09 122 13.84 7.60 31 2 .11 .8 1.1 MON 1.4 97 MAY 21 1139 18.19 37 34.22 121 57.16 9.48 11 2 .02 .5 .7 HAY 1.0 97 MAY 21 1208 29.03 36 48.11 121 31.15 7.78 41 2 .07 .2 .3 SJB 1.4 97 MAY 21 1343 43.03 37 16.92 119 12.16 6.30 12 .03 .7 8.5 KAI - 2.1 97 MAY 21 1815 55.18 36 46.45 121 16.95 8.30 60 .06 .2 .3 PAI # 2.8 97 MAY 21 1905 5.31 36 46.37 121 16.93 7.59 11 .05 .4 .9 PAI 1.1 97 MAY 21 1937 25.12 38 48.71 122 48.66 3.61 12 .02 .3 .5 GEY 1.6 97 MAY 21 2052 37.89 37 36.88 118 51.47 5.58 12 .06 .3 .6 SMO 1.2 97 MAY 22 35 36.76 40 20.03 125 4.50 5.42 7 .2415.212.3 MEN - 2.2 97 MAY 22 55 34.21 38 54.36 122 41.51 0.91 10 .04 .3 .7 KON 1.8 97 MAY 22 323 38.94 36 15.10 120 24.47 8.12 26 .10 .3 .4 COA 2.3 97 MAY 22 437 40.21 36 34.13 121 7.16 7.94 7 .09 .6 2.3 BVL 1.2 97 MAY 22 509 8.93 37 37.77 121 55.01 1.54 10 .12 .4 4.6 DAN 1.3 97 MAY 22 634 2.82 36 34.39 121 11.98 4.53 41 .19 .3 1.0 PIN 2.4 97 MAY 22 656 25.99 36 49.82 121 24.45 8.44 50 .07 .2 .4 HOL 2.1 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 ---------------------------------------------------------------------------- MAY 12 033233.3* 18.797N 107.104W 33N 4.1 0.9 28 OFF COAST OF JALISCO, MEXICO 033409.0 18.738N 107.008W 33N 3.9 0.9 31 OFF COAST OF JALISCO, MEXICO 035100.1 37.988N 48.038E 10G 4.4 1.0 33 NORTHWESTERN IRAN 044156.0 18.762N 107.093W 33N 5.2 4.8 0.7 112 OFF COAST OF JALISCO, MEXICO 073720.1? 20.04 S 172.28 W 33N 5.1 0.3 12 TONGA ISLANDS REGION 085302.4* 51.165S 138.572E 33N 4.2 0.4 9 SOUTH OF AUSTRALIA 133645.6 4.388S 102.848E 33N 5.1 0.9 27 SOUTHERN SUMATERA, INDONESIA 231753.5* 2.062N 97.614E 33N 4.4 1.0 18 NORTHERN SUMATERA, INDONESIA MAY 13 070218.1* 43.778N 137.011E 300G 4.2 0.5 24 EASTERN SEA OF JAPAN 205603.5 63.054N 149.083W 100G 0.4 7 CENTRAL ALASKA MAY 14 030833.7* 31.790N 115.776W 5G 1.0 16 BAJA CALIFORNIA, MEXICO 141420.6 33.135N 60.288E 33N 4.9 0.8 28 NORTHERN IRAN 154840.5? 14.49 N 93.54 W 33N 4.4 0.9 20 NEAR COAST OF CHIAPAS, MEXICO 170457.7& 66.230N 149.690W 9 14 NORTHERN ALASKA. . ML 2.5 MAY 15 002404.3 45.245N 6.677E 5G 1.3 19 FRANCE 014714.0 59.960N 153.282W 151* 0.7 34 SOUTHERN ALASKA 035833.5 34.379N 89.722E 33N 4.8 0.6 28 XIZANG 043920.8 14.362N 89.874W 272D 5.0 0.9 87 GUATEMALA 100514.0 35.407N 27.423E 33N 4.6 0.8 20 DODECANESE ISLANDS 133152.9 34.352N 116.875W 5G 0.9 29 SOUTHERN CALIFORNIA. ML 3.0 142901.8 33.883N 118.471W 5G 0.9 25 SOUTHERN CALIFORNIA. ML 3.0 (PAS). Felt near Los Angeles International Airport. 150841.6* 31.565N 115.896W 5G 0.9 19 BAJA CALIFORNIA, MEXICO 155450.2 16.949S 173.485W 33N 5.4 5.1 0.8 111 TONGA ISLANDS 164509.5 36.868N 121.568W 5G 0.6 10 CENTRAL CALIFORNIA. ML 2.8 (GS). 180133.1 21.656S 169.839E 33N 5.3 5.6 0.9 55 LOYALTY ISLANDS REGION 183024.4 36.396N 70.846E 185D 4.9 0.7 33 HINDU KUSH REGION, AFGHANISTAN 235328.7 63.258N 152.027W 33N 0.8 6 CENTRAL ALASKA MAY 16 012320.5 40.552N 114.963W 5G 3.6 1.4 53 NEVADA. ML 4.4 (GS) 070048.5 41.044N 20.202E 10G 5.3 5.3 1.3 144 ALBANIA. ML 4.9 (ROM). Damage to some old houses in the Lake Ohrid, Albania area. Felt at Edhessa, and Kastoria, Greece. 111807.6* 30.257N 97.081E 33N 5.5 5.0 1.0 28 XIZANG 124531.5 33.459N 118.323W 10G 1.1 22 SOUTHERN CALIFORNIA. ML 2.9 (GS) 141657.4* 21.667S 169.854E 33N 5.4 5.3 1.1 38 LOYALTY ISLANDS REGION 175009.5* 0.187S 16.835W 10G 5.0 4.7 0.9 15 NORTH OF ASCENSION ISLAND 183821.9 21.450S 177.442W 294D 4.8 0.8 57 FIJI ISLANDS REGION 211757.9* 11.097N 61.285W 33N 4.5 1.1 17 WINDWARD ISLANDS 222040.3 34.979N 116.981W 5G 1.0 27 SOUTHERN CALIFORNIA. ML 3.0 224102.5* 55.488N 162.367E 33N 5.2 4.6 0.9 62 NEAR EAST COAST OF KAMCHATKA MAY 17 002614.3* 8.381N 58.487E 10G 4.7 5.1 1.1 23 CARLSBERG RIDGE 021019.6 26.905S 69.307W 106D 5.5 0.8 110 NORTHERN CHILE. Mw 5.6 Felt (V) at Copiapo; (IV) at El Salvador, Inca de Oro and Potrerillos; (III) at Diego de Almagro; (II) at Taltal. 035823.9 39.594N 76.969E 33N 5.2 4.9 1.1 36 SOUTHERN XINJIANG, CHINA. One person injured at Jiashi. 085804.6* 57.340N 155.551W 120D 3.9 1.2 15 ALASKA PENINSULA MAY 18 045834.8 30.368S 177.277W 33N 5.5 5.4 0.8 58 KERMADEC ISLANDS, NEW ZEALAND. 070833.1* 20.548S 174.484W 63D 4.5 0.6 15 TONGA ISLANDS 100127.7 54.023N 165.171W 47* 4.8 1.0 50 FOX ISLANDS, ALEUTIAN ISLANDS 134051.3 52.970N 167.835W 33N 4.5 0.8 26 FOX ISLANDS, ALEUTIAN ISLANDS 160849.0? 7.84 S 120.26 E 217D 4.7 0.7 7 FLORES SEA 214530.4 34.748N 120.466W 5G 0.6 19 SOUTHERN CALIFORNIA. ML 3.2 MAY 19 000319.2* 23.647N 108.707W 10G 4.2 1.0 19 GULF OF CALIFORNIA 022548.7 6.426N 82.270W 10G 5.1 5.1 1.0 80 SOUTH OF PANAMA 072004.2 9.525S 78.698W 50D 4.7 0.6 35 NEAR COAST OF NORTHERN PERU 091523.7 52.998N 164.046W 33N 4.8 0.8 43 SOUTH OF ALASKA. ML 4.4 (AEIC). 112343.3? 16.35 N 100.95 W 33N 4.3 0.9 21 NEAR COAST OF GUERRERO, MEXICO 131747.1 35.244N 117.239W 5G 0.8 24 CENTRAL CALIFORNIA. ML 3.1 (GS). 194534.0* 34.734N 85.474W 5G 0.4 5 ALABAMA. mbLg 2.9 (GS). 225439.3 34.920N 116.925W 5 0.7 26 SOUTHERN CALIFORNIA. ML 2.7 232541.3 27.492S 68.771W 103D 4.3 0.7 17 CHILE-ARGENTINA BORDER REGION MAY 21 141028 Q 20.5 S 169.1 E 80 6.5 0.9 100 VANUATU ISLANDS 225129 Q 23.2 N 80.0 E 40 6.1 0.7 82 SOUTHERN INDIA 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.