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 June 19 - 25, 1997 Stephen R. Walter U.S. Geological Survey 345 Middlefield Rd. MS-977, Menlo Park, CA 94025 San Francisco Bay Area It was a quiet week with only one event in the area as large as M2.0. During the seven-day period ending at midnight on Wednesday, June 25, 1997 the U.S. Geological Survey office in Menlo Park recorded 23 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. Only one was as large as M2. This total compares to 16 earthquakes during the prior seven-day period (June 12 - 18), four of which were as large as M2. The sole M2 earthquake was a M2.4 that occurred along the creeping segment of the San Andreas about seven miles southeast of San Juan Bautista just after noon last Thursday (#1/1). The only other quakes of note were a pair of M1's on the northern Hayward fault beneath the west side of the Berkeley Hills (#2/1). Northern & Central California The largest earthquake in the region was a M3.8 that occurred late Wednesday afternoon about 35 miles offshore of Cape Mendocino (#2/2). This was one of four M > 2.0 events to occur in the vicinity of the Mendocino fracture zone. Activity in the Coast Ranges was limited to a trio of M2 events southeast of Lake Pillsbury (#1/2) and a pair of M2's at the Geysers geothermal area, the largest a M2.6 last Saturday afternoon (#4/2). Four M2 earthquakes occurred in the vicinity of Lassen Peak, the southernmost of the high Cascade volcanoes (#5/2). The first two, both M2.2 events, occurred early Sunday morning about 1.5 miles southwest of Lassen Peak at a depth of about four kilometers beneath Ski Heil Peak. Late Monday evening a M2.0 occurred about three miles southwest of Lassen Peak, again at a depth of about four kilometers beneath Mt. Diller. It was followed early Tuesday morning by a M2.9 in essentially the same location. Activity in central California included a M2.2 on the Parkfield segment of the San Andreas (#3/2), a M2.4 about 37 miles offshore of Pacific Grove (#7/2), and a M2.6 beneath the central valley (#9/2). Activity in the Sierra Nevada included a 27-km-deep M2.4 beneath the Sierra Nevada crest (#6/2), and a M2.4 about six miles southeast of Lake Isabella (#9/2). Long Valley Caldera Only one earthquake as large as M2 occurred within the caldera during the week, a M2.4 early last Friday afternoon that was located about one mile south of the airport (#4/3). Activity south of the caldera include a pair of M2's near the south end of the Round Valley fault (#1,#2/3) and a M2.3 near Red Slate Mountain (#3/3). USA Seismicity (June 12 - 23) The Pacific Northwest was the most active area on the continent during the past week according to data provided by the National Earthquake Information Center. Just after noon on Monday M4.6 occurred beneath western Puget Sound, producing slight damage at the Naval shipyard in Bremerton. It was felt strongly in the Seattle area from Mount Vernon to Olympia and was followed by several aftershocks, the largest a M3.1 (#3/4). The following day a M4.2 occurred in the eastern Cascades that was felt in the Chelan, Grand Coulee, and Okanogan areas (#5/4). Less than 15 minutes later a M4.5 occurred beneath the Straits of Georgia northeast of Vancouver Island (#6/4). Occurring in much the same location as a M3.4 on June 13, Tuesday's earthquake was felt from Campbell River to the north to Victoria on the south and in the Fraser Valley as far east as Abbotsford. Southern California was also active at the M4 level with a trio of M4's occurring east of San Clemente Island, the largest a M4.8 that was felt as far away as Santa Catalina Island, in parts of Orange County, and in San Diego (#2/4). Other events of note in the area included a M4.1 last Thursday in Baja California (#1/4) and a M3.4 on Monday evening west of Tehachapi (#4/4). The Planet Earth (June 12 - 23) The planet was relatively quiet this past week with only one "large" earthquake: a M6.1 near the Molucca Islands in the northern Indonesian archipelago (#5/5). Moderate earthquakes that were widely felt include a M5.5 in the Santiago del Estero province of northern Argentina that produced minor damage in the Tucaman area and was felt strongly throughout much of the province (#1/5); a M4.7 in the Taiwan area that was felt strongly at Taipei and in the northeastern parts of the island (#2/5); a M5.4 along the Chile-Argentina border that was felt at Santiago, Rancagua, and Valparaiso, Chile (#3/5), a M4.8 in southern Xinjiang, China that was felt in Jiashi county (#4/5); and a M5.8 in northern Iran that was presumbably widely felt though no reports have yet been received (#6/5). 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 JUN 19 745 23.36 36 11.19 120 12.17 6.66 16 .06 .6 1.8 COA 1.5 97 JUN 19 812 42.32 38 48.79 122 48.38 1.10 9 .02 .3 .3 GEY 1.5 97 JUN 19 903 55.06 37 30.49 121 40.41 9.28 57 3 .03 .1 .3 HAM 1.7 97 JUN 19 1026 33.26 39 21.61 122 52.59 11.65 28 .06 .2 1.0 BAR 2.0 97 JUN 19 1044 53.39 38 46.13 122 43.10 1.54 9 .04 .3 .5 GEY 1.4 97 JUN 19 1320 9.07 35 52.20 120 45.42 9.63 17 2 .03 .4 1.8 ROB 1.0 97 JUN 19 1401 52.32 38 48.74 122 47.97 3.17 17 .03 .2 .5 GEY 1.4 97 JUN 19 1434 37.04 37 19.43 121 41.41 8.88 43 3 .05 .1 .3 SFL 1.5 97 JUN 19 1445 47.30 40 18.37 124 33.74 18.59 12 1 .05 1.2 .4 MEN 2.3 97 JUN 19 1607 29.83 38 50.57 122 48.51 1.37 12 1 .04 .3 .6 GEY 1.4 97 JUN 19 1641 52.01 38 49.32 122 48.48 3.97 9 .01 .3 .8 GEY 1.4 97 JUN 19 1649 38.05 39 21.60 122 52.80 9.49 16 1 .03 .3 1.2 BAR 1.7 97 JUN 19 1729 23.52 37 24.69 118 39.95 14.05 19 .09 .7 1.8 WCS 1.5 97 JUN 19 1730 36.44 37 26.32 118 39.46 5.53 25 2 .05 .3 1.6 WCS 2.0 97 JUN 19 1809 40.69 36 12.78 120 46.88 8.66 14 1 .05 .3 .4 BIT 1.2 97 JUN 19 1837 37.03 35 55.60 120 28.45 5.79 31 .06 .2 .2 MID 2.2 97 JUN 19 1939 19.18 36 45.45 121 27.65 7.75 54 .11 .2 .3 SJB 2.4 97 JUN 19 1939 55.08 36 45.94 121 27.59 8.78 32 .06 .2 .4 SJB 1.0 97 JUN 19 1946 40.02 36 46.15 121 27.53 8.88 12 1 .05 .3 .6 SJB 1.2 97 JUN 19 1948 16.59 37 37.89 118 51.73 7.07 10 .04 .8 1.0 SMO 1.3 97 JUN 19 2057 49.84 37 31.69 121 40.20 4.69 19 1 .05 .2 .4 HAM 1.3 97 JUN 20 251 52.79 36 0.39 120 52.65 10.68 14 .04 .4 1.1 ROB 1.2 97 JUN 20 405 37.00 37 25.00 118 37.80 10.05 23 .04 .3 1.3 RVL 2.5 97 JUN 20 509 58.72 37 41.12 118 52.82 7.23 11 2 .03 1.0 .8 DOM 1.3 97 JUN 20 906 48.40 36 53.15 121 37.06 6.75 52 3 .09 .1 .3 SJB 1.9 97 JUN 20 1111 31.39 37 29.94 118 52.28 6.35 25 1 .05 .3 .7 MOR 2.3 97 JUN 20 1138 48.02 37 36.80 118 51.15 3.86 15 1 .02 .3 .6 SMO 1.4 97 JUN 20 1139 15.63 38 50.60 122 48.49 1.17 10 .04 .3 .8 GEY 1.4 97 JUN 20 1147 3.34 37 37.91 118 52.77 5.94 22 2 .05 .2 .4 SMO 1.7 97 JUN 20 1156 47.72 37 29.70 118 52.14 5.16 22 .05 .4 1.1 MOR 1.8 97 JUN 20 1513 29.45 37 30.74 118 51.58 4.83 8 .02 4.0 4.7 MOR - 1.2 97 JUN 20 1540 49.94 40 13.95 123 37.99 25.04 14 1 .09 .4 .9 MEN 1.9 97 JUN 20 1547 55.09 38 50.48 122 49.64 2.50 9 .01 .3 .8 GEY 1.0 97 JUN 20 1548 1.27 38 50.60 122 49.60 1.96 10 .03 .3 1.0 GEY 1.0 97 JUN 20 1634 11.91 37 37.84 118 52.67 6.66 14 .03 .3 .6 SMO 1.7 97 JUN 20 1744 43.70 36 39.92 121 10.25 7.57 47 1 .16 .3 .5 PAI 1.9 97 JUN 20 1904 52.24 37 37.94 118 52.67 7.30 11 1 .02 .4 .8 SMO 1.2 97 JUN 20 1959 9.57 37 37.96 118 52.82 7.38 8 .02 .8 2.7 SMO 1.3 97 JUN 20 2016 50.30 37 16.95 121 40.75 4.32 8 2 .02 1.7 2.8 SFL 1.2 97 JUN 20 2124 5.75 38 48.42 122 48.21 4.41 14 1 .01 .2 .5 GEY 1.4 97 JUN 20 2124 52.60 37 36.69 118 51.45 3.77 27 2 .08 .3 .3 SMO 2.4 97 JUN 20 2347 49.71 41 4.95 124 0.23 11.80 8 1 .25 1.4 1.5 EUR # 1.7 97 JUN 21 12 55.50 36 59.06 121 38.29 4.44 38 .11 .2 .5 SAR 1.5 97 JUN 21 130 44.59 38 48.79 122 48.54 3.70 12 1 .01 .2 .4 GEY 1.2 97 JUN 21 203 19.20 38 43.63 122 24.48 0.28 7 .03 .3 1.8 GVL 1.4 --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 JUN 21 226 27.40 36 44.80 120 50.81 11.97 23 1 .03 .5 .7 ORT 1.4 97 JUN 21 441 17.16 38 49.42 122 47.73 4.39 8 .02 .4 .7 GEY 1.0 97 JUN 21 504 47.67 37 32.74 118 52.08 7.08 15 1 .04 .4 .6 MOR 1.4 97 JUN 21 644 32.04 37 35.94 119 0.47 3.72 7 1 .02 2.2 2.6 SIL 1.1 97 JUN 21 710 24.32 37 39.26 118 54.78 5.65 17 1 .04 .3 .5 DOM 1.4 97 JUN 21 716 8.20 38 48.43 122 46.45 1.06 7 .02 .3 .6 GEY 1.5 97 JUN 21 716 40.50 38 48.60 122 46.74 1.68 7 .02 .4 .5 GEY 2.3 97 JUN 21 716 46.95 38 48.47 122 46.59 0.88 27 1 .05 .2 .3 GEY 1.8 97 JUN 21 718 36.06 37 32.60 118 51.97 8.53 12 1 .05 .7 1.0 MOR 1.1 97 JUN 21 747 58.70 38 52.09 122 50.33 0.04 7 .16 .8 4.0 GEY # 1.3 97 JUN 21 758 22.47 40 24.30 124 28.68 13.03 9 .06 1.5 .3 MEN 2.1 97 JUN 21 759 12.84 37 40.75 118 52.29 1.53 8 .03 .9 .6 DOM 1.3 97 JUN 21 815 5.71 38 48.72 122 48.58 3.57 14 .02 .2 .4 GEY 1.5 97 JUN 21 831 14.89 36 53.13 121 37.10 7.00 56 1 .09 .2 .3 SJB 1.9 97 JUN 21 1040 29.38 36 46.00 121 21.61 6.81 44 2 .28 .4 .6 HOL # 1.6 97 JUN 21 1045 23.46 37 38.77 118 58.56 8.87 13 .03 .3 .6 SMO 1.3 97 JUN 21 1052 29.64 37 34.81 121 57.70 9.26 10 2 .05 1.0 .6 HAY 1.1 97 JUN 21 1124 44.98 37 39.39 118 54.93 4.78 19 2 .03 .3 .4 DOM 1.5 97 JUN 21 1129 27.52 37 37.87 118 52.72 6.53 11 .04 .4 .7 SMO 1.1 97 JUN 21 1226 44.42 36 16.64 120 7.49 5.14 9 .04 1.4 1.2 COA 1.3 97 JUN 21 1341 40.33 37 30.53 121 40.42 8.91 15 3 .02 .3 .9 HAM 1.2 97 JUN 21 1519 48.50 38 49.21 122 47.82 3.90 7 .01 .4 .6 GEY 1.0 97 JUN 21 1959 28.87 40 36.92 124 12.16 5.00 8 1 .65 4.2 6.1 EUR # 1.7 97 JUN 21 2142 35.31 40 55.96 122 23.06 5.01 7 1 .02 .7 7.9 SHA - 1.6 97 JUN 21 2154 18.24 38 47.11 122 43.30 2.83 38 .07 .1 .3 GEY 2.6 97 JUN 21 2326 20.65 38 47.27 122 43.14 1.98 8 .03 .3 .7 GEY 1.4 97 JUN 22 115 3.45 37 27.87 118 48.61 4.81 17 2 .04 .8 1.4 MOR 1.3 97 JUN 22 206 24.19 37 38.24 118 52.68 4.10 10 1 .04 .7 .5 SMO 1.0 97 JUN 22 210 29.49 37 3.56 121 29.06 5.55 22 .08 .2 .4 CYS 1.3 97 JUN 22 232 35.90 37 28.43 118 46.35 5.34 11 2 .08 .9 3.4 WCN 1.3 97 JUN 22 306 31.84 37 9.29 121 33.47 2.87 45 .08 .2 .4 CYN 1.7 97 JUN 22 720 26.03 36 1.87 120 56.60 5.41 9 1 .02 .3 .5 ROB 1.1 97 JUN 22 722 20.62 36 0.69 120 33.83 5.03 9 2 .02 .4 1.6 SLA 1.1 97 JUN 22 722 45.97 36 30.20 120 47.88 7.81 13 .02 .7 1.3 CRV 1.1 97 JUN 22 818 45.27 37 40.75 118 52.35 1.74 8 1 .02 1.0 .7 DOM 1.2 97 JUN 22 1004 56.43 40 27.92 121 30.08 2.32 7 .02 1.1 .7 LAS 1.9 97 JUN 22 1014 14.86 40 28.22 121 31.45 3.70 9 .02 .4 .3 LAS 2.2 97 JUN 22 1041 7.32 40 28.15 121 31.44 4.36 9 2 .02 1.5 1.0 LAS 2.2 97 JUN 22 1044 25.44 40 28.05 121 30.59 5.10 7 .03 1.1 .9 LAS 1.6 97 JUN 22 1052 35.29 38 48.56 122 48.86 4.82 27 .03 .1 .3 GEY 1.9 97 JUN 22 1142 39.34 40 28.10 121 31.04 4.14 7 .03 1.5 .8 LAS 1.9 97 JUN 22 1420 55.72 39 43.41 123 27.59 7.22 12 .05 .3 .8 MAA 1.6 97 JUN 22 1453 23.48 37 37.75 118 58.86 7.96 15 1 .05 .3 .8 SMO 1.6 97 JUN 22 1458 47.45 37 39.00 118 51.19 7.28 17 1 .04 .4 .5 HCF 1.5 97 JUN 22 1626 29.38 37 34.69 121 57.08 9.63 55 1 .08 .2 .3 HAY 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 97 JUN 22 1801 3.03 38 49.10 122 47.90 4.35 22 .04 .2 .4 GEY 1.8 97 JUN 22 1801 42.40 38 49.11 122 47.88 3.74 12 1 .02 .3 .4 GEY 1.3 97 JUN 22 1848 20.22 37 34.82 121 57.09 9.49 51 4 .06 .1 .2 HAY 1.5 97 JUN 22 1901 53.80 36 49.77 121 17.58 4.45 37 .05 .2 .3 QUI 1.5 97 JUN 22 2104 30.93 38 24.04 122 39.15 9.21 8 2 .03 .9 .5 ROG 1.3 97 JUN 22 2122 49.20 36 35.34 121 11.79 8.51 34 1 .06 .2 .4 PIN 1.7 97 JUN 23 341 41.78 37 39.14 118 51.18 4.81 13 .06 .4 .7 HCF 1.5 97 JUN 23 510 49.56 38 46.24 122 43.96 2.94 7 .03 .4 .8 GEY 1.3 97 JUN 23 754 41.29 41 8.96 122 10.11 17.12 11 1 .02 .4 .8 SHA 1.6 97 JUN 23 1002 13.19 38 47.49 122 46.73 4.83 25 .04 .2 .4 GEY 1.8 97 JUN 23 1239 34.37 39 43.35 121 58.57 5.76 13 .04 .6 2.0 SAC 2.1 97 JUN 23 1638 57.39 36 30.00 121 4.57 3.81 28 1 .04 .2 .3 BIT 1.9 97 JUN 23 1650 30.64 40 27.26 121 32.79 3.69 7 1 .02 1.6 .9 LAS 1.8 97 JUN 23 1810 42.16 37 25.11 119 43.62 27.30 8 .05 .5 .8 KAI 2.4 97 JUN 23 1853 52.17 40 47.02 121 49.24 9.67 10 1 .01 .6 1.4 SHA 1.8 97 JUN 23 1924 33.07 37 37.94 119 1.55 5.40 14 1 .04 .6 1.0 MAM 1.1 97 JUN 23 2018 49.60 36 56.05 121 27.75 6.37 24 .11 .4 .5 BUS 1.2 97 JUN 23 2143 45.77 37 39.76 118 51.10 4.96 7 .05 .6 .9 DOM 1.3 97 JUN 23 2324 18.22 38 48.71 122 53.71 6.76 8 .03 .6 1.6 GEY 1.1 97 JUN 23 2357 16.17 39 0.36 123 1.31 6.20 9 .04 .6 .5 MAA 1.5 97 JUN 24 18 44.64 36 33.02 122 34.45 10.08 40 .13 1.6 .6 POS 2.4 97 JUN 24 20 28.08 37 40.11 118 51.28 3.88 8 .02 .6 1.5 DOM 1.0 97 JUN 24 31 27.24 37 20.70 118 32.46 12.98 18 .04 .8 .9 KAI 1.9 97 JUN 24 124 59.67 37 38.22 118 54.71 4.81 11 .04 .5 .6 SMO 1.4 97 JUN 24 249 33.73 36 28.66 121 3.11 5.56 19 .03 .3 .6 BIT 1.3 97 JUN 24 359 57.78 35 35.79 118 21.63 9.49 12 .10 .3 .8 WWF 2.4 97 JUN 24 404 55.63 38 51.11 122 48.44 1.30 24 .05 .1 .4 GEY 1.8 97 JUN 24 506 30.49 40 27.81 121 33.01 4.01 9 2 .01 .7 .6 LAS 2.0 97 JUN 24 640 17.14 36 29.51 121 4.15 5.80 16 .03 .2 .4 BIT 1.0 97 JUN 24 714 34.25 37 7.26 120 7.56 14.58 58 6 .28 .2 .4 JQN 2.6 97 JUN 24 1130 29.26 38 48.12 122 47.98 4.09 16 1 .03 .2 .4 GEY 1.4 97 JUN 24 1148 46.68 40 28.11 121 33.19 4.35 9 .03 .3 .4 LAS 2.9 97 JUN 24 1327 40.55 37 28.60 118 49.45 11.32 10 .03 4.3 3.9 MOR 1.0 97 JUN 24 1511 41.94 39 21.67 122 52.53 12.12 29 .06 .2 .6 BAR 2.2 97 JUN 24 1536 58.00 38 49.20 122 47.79 3.89 7 .02 .4 .8 GEY 1.2 97 JUN 24 1743 43.02 38 48.07 122 47.96 4.16 19 .04 .2 .4 GEY 1.6 97 JUN 24 1749 36.58 38 50.44 122 53.00 0.73 13 .04 .2 .8 GEY 1.5 97 JUN 24 2106 55.07 37 37.85 118 52.55 6.93 13 1 .02 .3 .7 SMO 1.1 97 JUN 24 2158 31.53 37 3.73 121 55.02 24.21 11 .35 3.3 7.7 LOM 1.1 97 JUN 24 2159 42.28 38 49.64 122 50.16 1.28 8 .02 .3 .9 GEY 1.4 97 JUN 24 2200 54.09 38 49.59 122 49.63 1.85 8 .02 .4 1.0 GEY 1.4 97 JUN 25 22 54.24 37 27.87 118 47.08 10.34 24 1 .06 .3 1.1 MOR 1.8 97 JUN 25 111 34.86 37 50.86 122 13.85 4.75 8 .04 .4 .7 HAY 1.1 97 JUN 25 313 59.46 37 51.28 122 13.52 8.09 50 3 .07 .1 .3 HAY 1.6 97 JUN 25 400 55.24 37 38.89 118 54.55 5.60 19 2 .05 .3 .4 SMO 1.4 --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 JUN 25 405 47.54 37 39.09 118 54.62 5.55 11 2 .03 .5 .7 DOM 1.1 97 JUN 25 407 39.26 37 39.15 118 54.34 5.82 13 2 .04 .4 .6 DOM 1.1 97 JUN 25 417 4.75 37 39.20 118 54.45 5.85 13 1 .03 .5 .7 DOM 1.1 97 JUN 25 449 23.24 38 49.31 122 46.57 2.13 7 .03 .3 2.9 GEY 1.2 97 JUN 25 616 12.00 40 25.18 125 4.93 0.03 18 1 .14 2.2 2.0 MEN # 2.6 97 JUN 25 916 16.04 38 49.62 122 47.60 3.73 9 .03 .3 .7 GEY 1.5 97 JUN 25 1000 8.32 38 49.44 122 47.66 3.48 10 .02 .3 1.8 GEY 1.4 97 JUN 25 1023 22.71 39 21.59 122 52.63 11.40 24 .05 .2 1.1 BAR 2.0 97 JUN 25 1033 42.16 37 39.79 118 51.20 5.28 14 1 .05 .3 .6 DOM 1.0 97 JUN 25 1034 41.65 37 6.76 118 45.90 5.08 12 .2518.915.6 KAI - 1.3 97 JUN 25 1414 31.77 38 23.73 122 36.04 5.66 16 1 .04 .2 .7 ROG 1.6 97 JUN 25 1430 26.50 37 40.23 118 50.70 6.39 16 2 .04 .4 .7 DOM 1.5 97 JUN 25 1640 15.70 37 32.57 118 49.79 6.27 14 1 .04 .2 .6 MOR 1.1 97 JUN 25 1657 50.79 37 39.07 118 51.18 7.09 15 2 .04 .5 .5 HCF 1.1 97 JUN 25 1747 18.00 38 49.51 122 48.00 3.79 11 .03 .3 .7 GEY 1.6 97 JUN 25 1822 39.38 37 38.25 118 56.27 6.11 13 .06 .4 .6 SMO 1.5 97 JUN 25 1835 29.93 37 38.38 118 56.18 6.24 12 .04 .4 .6 SMO 1.2 97 JUN 25 2246 59.31 37 31.15 118 51.77 6.12 11 .06 .7 1.0 MOR 1.3 97 JUN 26 27 10.39 40 31.28 124 56.69 0.04 50 .47 5.211.4 MEN 3.4 97 JUN 26 126 3.22 36 57.51 121 26.63 6.84 23 .04 .3 .8 CYS 1.6 97 JUN 26 424 15.25 37 39.15 118 54.82 5.30 10 .05 .5 .7 DOM 1.2 97 JUN 26 519 0.83 38 46.46 122 43.69 1.62 9 .06 .3 .5 GEY 1.6 97 JUN 26 548 22.62 38 49.95 122 52.68 2.15 9 .04 .4 1.4 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 ----------------------------------------------------------------------------- JUN 12 120738.4 6.040S 146.972E 75* 5.6 0.8 79 EASTERN NEW GUINEA REG., P.N.G. JUN 13 011114.4* 17.198S 72.903W 33N 4.3 1.3 14 NEAR COAST OF PERU 045757.2 5.551S 149.527E 129D 4.6 0.9 27 NEW BRITAIN REGION, P.N.G. 064240.2* 21.836S 179.344W 400G 4.6 1.3 57 FIJI ISLANDS REGION 080711.5* 53.095S 9.321E 10G 5.1 4.4 1.3 15 SOUTHWEST OF AFRICA 132208.0 51.673N 16.157E 25 0.6 16 POLAND. ML 3.9 (GRF), 3.5 (VIE). 175414.4 33.339N 142.355E 42D 4.8 1.1 35 OFF EAST COAST OF HONSHU, JAPAN 232044.7 29.718N 68.630E 33N 4.8 3.8 1.1 56 PAKISTAN JUN 14 005902.5 0.741N 99.065E 67D 4.9 1.0 46 NORTHERN SUMATERA, INDONESIA 040449.9 36.692N 75.943E 68* 4.5 1.1 41 KASHMIR-XINJIANG BORDER REGION 071959.7? 51.41 N 179.30 E 50G 4.0 1.3 6 RAT ISLANDS, ALEUTIAN ISLANDS 093259.1? 51.58 N 179.78 W 50G 4.2 1.6 10 ANDREANOF ISLANDS, ALEUTIAN IS. 100808.8* 50.187S 114.566E 27D 4.5 0.7 11 SOUTH OF AUSTRALIA 102003.1 54.882N 160.883E 116D 4.1 0.9 23 NEAR EAST COAST OF KAMCHATKA 132238.9? 0.92 N 25.42 W 10G 4.4 1.3 5 CENTRAL MID-ATLANTIC RIDGE 155641.8* 24.136S 179.590E 600G 4.4 0.7 17 SOUTH OF FIJI ISLANDS 192519.3? 23.81 N 121.72 E 33N 4.0 1.7 10 TAIWAN 201806.7& 48.091N 121.619W 10 12 WASHINGTON. . MD 2.5 Felt in the Darrington area. 205914.7* 19.025S 177.598W 550G 4.1 0.9 14 FIJI ISLANDS REGION 211849.9* 2.329N 127.137E 33N 4.2 0.8 7 NORTHERN MOLUCCA SEA 221947.6? 49.90 N 179.82 W 33N 3.6 1.4 6 SOUTH OF ALEUTIAN ISLANDS 224355.2* 17.591S 70.791W 87* 4.4 1.1 27 NEAR COAST OF PERU JUN 15 013259.2* 32.985S 178.998W 200G 4.6 0.7 15 SOUTH OF KERMADEC ISLANDS 130111.2* 56.873S 25.030W 33N 5.1 4.9 0.9 18 SOUTH SANDWICH ISLANDS REGION 134036.3 6.325S 154.889E 56D 5.0 0.8 39 SOLOMON ISLANDS 153251.0 60.451N 147.246W 33N 3.2 1.4 18 SOUTHERN ALASKA. ML 3.3 (PMR). 170618.9 7.148S 155.646E 33N 5.0 5.2 0.8 28 SOLOMON ISLANDS 175112.7* 7.197S 155.682E 33N 4.7 0.9 19 SOLOMON ISLANDS 190730.5 11.466S 66.343E 10G 4.8 0.7 56 MID-INDIAN RIDGE 203717.4* 64.966N 164.144W 33N 1.4 5 NORTHERN ALASKA. ML 3.2 (PMR). 231835.8* 17.753S 178.900W 600G 4.6 0.9 38 FIJI ISLANDS REGION JUN 16 080216.5 3.375S 134.697E 33N 5.0 4.7 1.3 35 IRIAN JAYA REGION, INDONESIA 084500.7* 33.740N 137.057E 355 4.0 1.2 28 NEAR S. COAST OF HONSHU, JAPAN 090701.9 7.209S 155.671E 70G 4.4 1.2 24 SOLOMON ISLANDS 101704.8* 57.328S 25.258W 33N 4.8 1.2 15 SOUTH SANDWICH ISLANDS REGION 113833.0* 29.996N 130.941E 33N 4.3 1.3 19 RYUKYU ISLANDS 124548.7 23.613S 178.015W 400G 4.5 0.6 33 SOUTH OF FIJI ISLANDS 154205.2* 8.129S 118.534E 150G 4.6 1.0 14 SUMBAWA REGION, INDONESIA 154210.9* 8.100N 82.888W 33N 4.5 0.9 19 PANAMA-COSTA RICA BORDER REGION 193319.8* 5.215S 147.043E 150G 4.2 1.2 12 EASTERN NEW GUINEA REG., P.N.G. 225736.0 48.032S 125.293E 33N 4.7 0.9 21 SOUTH OF AUSTRALIA 230856.9* 1.104S 24.329W 10G 4.5 1.2 12 CENTRAL MID-ATLANTIC RIDGE 231654.0* 2.320N 31.386E 10G 4.5 1.2 41 UGANDA JUN 17 022838.3? 46.23 N 12.91 E 10G 0.9 6 NORTHERN ITALY. ML 3.2 (VIE). 041813.5? 15.29 N 141.93 E 33N 4.8 1.1 12 MARIANA ISLANDS REGION 045928.2? 32.96 S 178.46 W 33N 4.9 1.0 10 SOUTH OF KERMADEC ISLANDS 052629.9* 12.351N 143.456E 33N 4.5 0.9 13 SOUTH OF MARIANA ISLANDS 063516.8* 21.760S 179.784W 600G 4.6 0.8 48 FIJI ISLANDS REGION 082600.2* 15.680S 174.604W 33N 4.7 4.9 1.4 33 TONGA ISLANDS 100851.6* 58.142S 26.725W 100G 4.8 1.0 10 SOUTH SANDWICH ISLANDS REGION 132647.8? 3.39 N 128.39 E 33N 4.5 1.5 8 NORTH OF HALMAHERA, INDONESIA 135224.3? 23.55 S 179.91 E 600G 4.6 0.5 14 SOUTH OF FIJI ISLANDS 161846.5 6.551S 129.862E 109* 5.1 0.7 27 BANDA SEA 175000.9 8.309S 122.628E 200G 5.3 1.3 26 FLORES REGION, INDONESIA 221421.1 27.536S 64.635W 52* 5.5 5.5 0.9 120 SANTIAGO DEL ESTERO PROV., ARG. Minor damage in the Tucaman area. Felt strongly in many parts of Santiago del Estero Province. 225356.2* 39.509N 15.694E 305* 3.8 1.9 50 SOUTHERN ITALY JUN 18 020329.0* 24.022N 121.915E 33N 4.7 4.2 0.6 9 TAIWAN. Felt strongly at Taipei. Also felt in many parts of northeastern Taiwan. 022857.4? 23.42 S 179.49 E 400G 4.5 1.2 9 SOUTH OF FIJI ISLANDS 050611.0* 6.936S 129.826E 150G 4.6 0.9 12 BANDA SEA 080556.7 44.379N 114.109W 5G 0.9 17 WESTERN IDAHO. ML 3.5 (GS). 120444.9* 51.299N 179.312W 33N 4.6 1.0 41 ANDREANOF ISLANDS, ALEUTIAN IS. 143217.6? 19.20 N 108.28 W 10G 3.8 1.2 13 REVILLA GIGEDO ISLANDS REGION 162701.9? 30.14 S 179.10 W 350G 4.2 0.6 8 KERMADEC ISLANDS REGION 164724.1? 11.87 N 142.68 E 33N 4.8 1.3 11 SOUTH OF MARIANA ISLANDS 190120.6? 6.93 S 128.33 E 278? 4.2 1.4 6 BANDA SEA JUN 19 002340.9? 30.81 S 179.07 W 33N 5.4 1.2 12 KERMADEC ISLANDS REGION 100518.4 24.851N 125.331E 33N 5.3 4.5 1.0 48 SOUTHWESTERN RYUKYU ISLANDS. Felt on Miyako-jima. 112151.1 31.351N 115.682W 10G 4.1 1.0 29 BAJA CALIFORNIA, MEXICO 122102.7 33.173S 70.049W 103D 5.4 0.8 86 CHILE-ARGENTINA BORDER REGION. Felt (V) at Santiago; (IV) at Punitaqui and Rancagua; (III) at Quillota and Valparaiso, Chile. 224534.2* 51.684N 159.472E 33N 4.9 4.7 1.1 30 OFF EAST COAST OF KAMCHATKA JUN 20 023351.3 51.499N 173.627W 10G 5.1 4.8 1.0 71 ANDREANOF ISLANDS, ALEUTIAN IS. 043541.8 32.886N 118.105W 5G 4.3 1.0 48 OFF COAST-CALIFORNIA. Mw 4.8 Felt on Santa Catalina Island, parts of Orange County and at San Diego. 053851.7* 32.556N 118.308W 5G 3.9 0.9 25 OFF COAST-CALIFORNIA. ML 4.1 Felt. 080413.1 32.666N 118.169W 5G 3.8 0.8 42 OFF COAST-CALIFORNIA. ML 4.3 Felt. 125731.0* 32.203N 60.048E 10G 5.0 5.4 1.1 14 NORTHERN IRAN. About 60 houses destroyed in the Birjand area. 203547.9* 21.507N 145.551E 33N 4.8 0.9 27 MARIANA ISLANDS REGION 204101.1* 31.790N 116.133W 5G 0.9 20 BAJA CALIFORNIA, MEXICO. ML 3.0 JUN 21 041900.1* 17.925N 147.343E 33N 5.0 5.0 0.7 35 MARIANA ISLANDS REGION 065721.8* 1.825N 127.366E 33N 4.8 1.0 14 HALMAHERA, INDONESIA 222120.3* 32.965N 60.259E 10G 4.4 0.7 13 NORTHERN IRAN. Felt in the Birjand area. JUN 22 072432.3 51.925N 178.346W 33N 4.9 4.2 0.9 55 ANDREANOF ISLANDS, ALEUTIAN IS. 093604.7* 21.896N 121.143E 33N 5.1 1.2 24 TAIWAN REGION 132817.4 31.304N 141.706E 33N 5.0 4.8 0.9 33 SOUTH OF HONSHU, JAPAN 212538.8* 15.762S 176.866W 125D 4.7 0.5 27 FIJI ISLANDS REGION JUN 23 010345.0 10.351N 83.574W 22D 5.2 4.4 0.9 59 COSTA RICA 114636.1* 32.519N 140.893E 33N 5.0 4.4 0.5 38 SOUTH OF HONSHU, JAPAN 191326.3 47.620N 122.574W 10G 4.6 1.2 68 WASHINGTON. MD 4.9 (SEA). Slight damage at the Naval Shipyard in Bremerton. Felt strongly in the Seattle area from Mount Vernon to Olympia in the south. 193008.7 47.586N 122.586W 10G 1.0 7 WASHINGTON. MD 2.6 (SEA). 214623.6 47.593N 122.562W 10G 0.6 8 WASHINGTON. MD 3.1 (SEA). 231957.6 61.814N 148.528W 10G 1.1 10 SOUTHERN ALASKA. ML 3.6 (AEIC), 4.0 (PMR). Felt at Sutton and Palmer. JUN 24 044857.4 35.274N 118.601W 10G 0.9 32 CENTRAL CALIFORNIA. ML 3.4 092446.3* 39.177N 76.958E 33N 4.8 4.2 1.3 11 SOUTHERN XINJIANG, CHINA. Felt in Jiashi County 142311.5 48.444N 119.820W 10G 3.9 0.9 40 WASHINGTON. ML 4.2 (GS), MD 4.6 (SEA). Felt in the Chelan, Grand Coulee, Okanogan, and Republic, Washington area s. Also felt at Kamloops, Penticton, and Trail, British Columbia, Canada. 144057.9& 49.250N 123.620W 10 4.5 51 VANCOUVER ISLAND REGION. Felt (IV) along the coast northwest of Vancouver and in the Ladysmith- Nanaimo area on the east coast of Vancouver Island. Felt from Campbell River to Victoria on Vancouver Island, in the greater Vancouver area and in the Fraser Valley as far east as Abbotsford. 161709.0* 20.765S 174.082E 33N 5.3 5.5 0.8 34 VANUATU ISLANDS REGION. Mw 5.9 175414.2* 6.722N 73.014W 200G 4.6 0.7 36 NORTHERN COLOMBIA 204011.0& 47.580N 122.550W 8 8 WASHINGTON. MD 2.6. Felt. 230453 Q 1.8 S 127.8 E 33N 6.1 0.9 57 HALMAHERA, INDONESIA JUN 25 095019 Q 35.3 N 131.5 E 33N 5.6 0.7 63 SEA OF JAPAN 193840 Q 33.9 N 59.4 E 10G 5.8 0.9 50 NORTHERN IRAN 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.