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 April 28 - May 4, 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 During the seven-day period ending at midnight on Wednesday, May 4, 1994 the U.S. Geological Survey office in Menlo Park recorded 29 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. However, only two of these were as large as M2. This total compares to 17 earthquakes during the previous seven-day period (April 21 - 27), three of which were as large as M2. Though the number of earthquakes in the region was up slightly, none were large enough to have been felt. The largest earthquake during the week was a M2.2 in the East Bay late Tuesday night. It was located beneath the town of Alamo, about three miles north of Danville (#2 in figure 1). A slightly smaller M2.1 occurred earlier in the week along the creeping segment of the San Andreas about two miles south of San Juan Bautista (#1/1). The creeping segment was a bit more active than it has been in recent weeks with nearly a dozen other earthquakes, all smaller than M2. Northern & Central California The Gorda Plate region was the most seismically active area during the past week, producing a trio of M3's and several smaller earthquakes. Activity began with a M2.4 last Thursday in the southern Gorda Plate about 44 miles west of Eureka (#1/2). The following Monday two M3.3 earthquakes occurred in the Gorda Plate about 100 miles west of the coast. There were several events long the southern margin of the plate beginning with a M2.5 last Friday evening (#3/2), a M2.9 early Tuesday morning (#6/2), and a small cluster of events near the cape, the largest a M3.0 late Wednesday afternoon (#7/2). The only other M3 earthquakes in northern & central California occurred just after noon last Thursday in the southern Cascade Range about 13 miles northeast of Lassen Peak (#2/2). Both events locate just west of the southern end of the Hat Creek fault, near the point where the fault becomes buried beneath lava flows from West Prospect Peak. These are the largest earthquakes seen in this area since close monitoring of the Lassen Peak area began in 1981. Other events in northern California include a pair of small M2's north of Clear Lake and a M2.2 just northwest of Lake Berryessa. Central California was very quiet except for a pair of small M2's on the creeping segment of the San Andreas. Seismicity along the eastern Sierra Nevada consisted of a pair of M2's along the state border southeast of Lake Tahoe (#4/2), a M2.3 east of Mono Lake (#8/2), and a M2.0 about 30 miles southwest of Lone Pine. Long Valley Caldera For the second straight week there were no earthquakes as large as M2 inside the caldera. The lone M2 earthquake in the area was a M2.6 Tuesday night that occurred southeast of Mt. Morrison (#1/3). USA Seismicity (April 24 - May 5) According to data provided by the National Earthquake Information Center, at least a couple states outside of California experienced notable earthquakes during the past week. A M2.8 in north-central Oklahoma was felt by residents of Drummond and Enid (#3/4). Eastern Idaho continued to experience small aftershocks, the largest a M3.4 early last Friday morning (#4/4). Aftershocks also continued in southern California with activity in both the Northridge (#2/4) and Landers areas. A M3.3 off the southern coast of Oregon (#5/4) was part of the Gorda Plate activity discussed above in the Northern California section. The largest earthquake in the region was a M4.3 offshore of Vancouver Island, British Columbia (#1/4). The Planet Earth (April 24 - May 5) The largest earthquakes during the week were both centered in the Hindu Kush region of south-central Asia. The first was a Ms6.3 in northern Afghanistan that was felt strongly at Termiz and as far away as Tashkent, Usbekistan (#3/5). It was followed later the same day by a Ms6.2 in Tajikistan (#4/5). Only slightly smaller were a Mb5.9 in the Santiago Del Estero province of north-central Argentina (#1/5) and a Ms5.9 along the southwest coast of Sumatera, Indonesia (#5/5). Two moderate earthquakes are worth noting: a Mb5.6 in Kyushu, Japan that was felt at Miyazaki, Kagoshima, Kumamoto, and Oita (#2/5) and a Mb5.6 beneath southeastern Iceland (#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 94 APR 28 911 8.02 35 31.76 120 5.54 9.12 9 .24 .8 1.7 SIM 1.0 94 APR 28 911 9.06 35 32.01 120 6.48 6.98 11 .11 .5 1.8 SIM 2.0 94 APR 28 1203 9.03 37 5.01 122 22.27 12.19 10 .11 2.6 1.7 ANN 1.1 94 APR 28 1502 48.38 40 45.63 125 0.73 25.28 21 1 .16 2.414.0 DEL- 2.6 94 APR 28 1738 34.15 37 56.21 120 25.80 0.93 7 .09 .6 9.9 YOSB- 1.3 94 APR 28 1906 14.85 40 36.87 121 19.35 0.22 30 .15 .5 4.0 SHA 3.1 94 APR 28 1907 31.74 40 36.31 121 19.67 5.17 11 2 .16 1.1 5.0 SHA 1.8 94 APR 28 1910 59.97 40 36.70 121 19.79 7.17 32 2 .15 .4 1.1 SHA 3.1 94 APR 28 2035 0.90 38 44.25 122 43.66 2.83 17 .11 .3 .7 NAP 1.8 94 APR 28 2345 15.97 38 47.79 122 44.21 3.62 18 .09 .3 .6 GEY 1.7 94 APR 28 2351 9.32 35 32.47 119 44.84 0.01 14 2 .28 1.8 .9 BAK * 2.3 94 APR 29 59 56.86 37 0.40 121 44.95 12.94 25 .06 .3 .7 LOM 1.2 94 APR 29 215 10.21 38 49.35 122 48.00 4.39 13 .04 .3 .6 GEY 1.5 94 APR 29 318 28.79 37 30.29 121 40.65 8.48 13 1 .03 .3 .7 HAM 1.1 94 APR 29 433 18.67 38 50.44 122 48.57 2.10 10 .03 .3 .8 GEY 1.5 94 APR 29 631 14.34 38 49.24 122 49.67 2.05 7 .04 .4 .8 GEY 1.2 94 APR 29 642 26.03 40 36.54 121 19.93 5.98 17 2 .10 .6 1.6 SHA 1.7 94 APR 29 909 35.17 38 35.10 122 41.88 2.63 30 .12 .3 .9 NAP 2.0 94 APR 29 939 55.92 36 2.72 120 35.12 4.99 22 3 .08 .3 .4 SLA 1.2 94 APR 29 1042 6.62 36 49.23 121 32.49 5.09 77 3 .22 .3 .4 SJB 2.2 94 APR 29 1134 33.00 36 49.16 121 32.52 5.20 68 1 .21 .3 .4 SJB 1.9 94 APR 29 1137 37.57 36 47.87 121 6.05 1.22 16 .09 .4 9.6 ORT - .8 94 APR 29 1314 42.15 36 7.94 118 10.58 13.17 10 1 .09 .6 1.8 WWF 2.1 94 APR 29 1440 43.04 40 38.64 121 55.34 20.40 14 1 .12 .7 1.1 SHA 1.7 94 APR 29 1543 25.37 37 35.66 118 49.22 5.16 11 1 .13 .4 1.7 MOR 1.4 94 APR 29 1703 45.80 37 56.63 120 26.19 0.44 8 1 .16 1.0 4.0 YOSBB 1.3 94 APR 29 1804 20.62 38 50.32 122 49.65 1.99 8 .05 .3 1.1 GEY 1.2 94 APR 30 4 49.86 38 45.42 122 42.77 2.16 8 .06 .4 .5 GEY 1.1 94 APR 30 113 3.83 38 45.67 122 44.27 2.20 7 .03 .4 .6 GEY 1.2 94 APR 30 134 6.90 37 36.07 118 29.19 7.99 13 2 .04 .3 1.0 CHV 1.6 94 APR 30 144 33.48 36 35.50 121 11.69 9.62 25 .06 .2 .5 PIN 1.5 94 APR 30 255 23.88 40 24.84 125 29.90 20.88 21 1 .30 8.516.2 MEN * 2.5 94 APR 30 418 24.12 40 17.53 124 24.73 18.21 13 1 .08 1.0 .3 MEN 1.6 94 APR 30 544 7.05 40 28.83 124 11.08 20.03 12 1 .09 .5 .6 EUR 1.3 94 APR 30 751 52.87 36 47.26 121 28.82 4.45 26 1 .20 .4 .8 SJB 1.4 94 APR 30 952 42.59 36 57.74 121 41.26 10.13 24 2 .11 .4 .7 SAR .9 94 APR 30 1026 53.43 36 57.54 121 41.35 11.74 28 .09 .3 .7 SAR 1.0 94 APR 30 1035 48.35 39 48.53 123 30.02 9.67 16 1 .07 .3 .5 MAA 1.2 94 APR 30 1244 52.43 38 46.80 122 44.78 0.02 12 .04 .2 .7 GEY 1.3 94 APR 30 1321 18.16 37 16.03 121 57.37 4.21 19 2 .15 .3 1.6 SCV 1.0 94 APR 30 1325 41.55 40 25.43 124 22.14 16.90 17 1 .08 .7 .3 MEN 1.9 94 APR 30 1448 16.83 37 23.10 122 20.02 0.03 11 .06 .4 1.7 BLM * 1.1 94 APR 30 1528 53.17 37 37.63 118 53.13 4.65 12 .12 .5 .8 SMO 1.1 94 APR 30 1925 49.45 36 34.87 120 38.34 12.49 9 1 .05 1.6 .8 CRV 1.8 94 APR 30 2054 14.53 37 17.05 121 39.57 3.51 8 .01 .3 .6 SFL .9 --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 APR 30 2054 48.65 36 36.42 120 42.43 13.18 13 .10 .7 .5 CRV 1.5 94 APR 30 2258 59.45 38 49.32 122 48.25 4.12 15 2 .06 .3 .6 GEY 1.3 94 MAY 1 221 56.76 38 46.95 121 13.45 10.26 15 3 .05 .3 .7 AUB 1.4 94 MAY 1 254 46.23 36 34.43 121 10.05 6.10 29 1 .05 .2 .5 PIN 1.7 94 MAY 1 519 25.61 36 46.29 121 28.48 8.58 28 1 .18 .4 .7 SJB 1.2 94 MAY 1 716 5.16 38 47.08 122 45.41 0.85 7 .03 .3 .9 GEY 1.4 94 MAY 1 901 8.79 37 33.08 118 27.84 1.75 8 .17 .913.7 CHV - 1.6 94 MAY 1 1228 2.73 37 32.49 121 55.16 9.96 25 2 .08 .3 .5 MIS 1.1 94 MAY 1 1347 1.16 38 47.81 122 44.93 0.03 8 .09 .4 1.4 GEY * 1.4 94 MAY 1 1448 34.60 37 34.07 118 44.97 5.07 10 .10 .4 1.0 WCN 1.5 94 MAY 1 1642 46.72 39 13.97 122 47.28 3.74 14 .14 .4 4.0 BAR 2.0 94 MAY 1 1728 41.44 36 46.13 121 23.52 9.75 11 2 .11 .6 1.1 HOL .9 94 MAY 1 1736 43.24 38 49.48 122 47.88 3.95 9 .04 .4 .7 GEY 1.2 94 MAY 1 1749 35.54 38 37.75 119 26.91 0.01 14 .36 4.3 2.7 WAK * 2.5 94 MAY 1 1946 23.22 37 34.12 118 50.41 7.86 10 .12 .6 1.7 MOR 1.2 94 MAY 1 2052 2.32 37 12.34 121 35.97 2.94 38 .08 .2 .6 SFL 1.5 94 MAY 1 2343 21.39 36 36.49 121 12.27 5.44 10 3 .06 .4 .7 PIN 1.0 94 MAY 2 58 7.38 37 21.29 121 43.10 10.44 9 2 .09 .6 1.2 ALU 1.0 94 MAY 2 59 36.10 37 21.59 121 42.64 8.95 10 2 .05 .5 .9 ALU .9 94 MAY 2 239 44.72 38 49.22 122 47.98 3.99 9 .02 .4 .6 GEY 1.3 94 MAY 2 347 30.90 37 19.78 121 41.75 6.71 17 2 .10 .4 .7 SFL .9 94 MAY 2 434 6.05 38 49.71 122 49.90 0.78 8 .08 .4 2.2 GEY 1.4 94 MAY 2 511 14.30 36 35.12 121 11.11 6.49 21 .04 .3 .5 PIN 1.3 94 MAY 2 633 24.74 36 45.85 121 23.40 9.13 14 2 .13 .4 .8 HOL .8 94 MAY 2 719 45.13 38 50.01 122 48.10 2.13 9 .03 .3 .5 GEY 1.3 94 MAY 2 757 48.45 37 40.32 118 51.83 3.96 12 .08 .5 1.1 DOM 1.4 94 MAY 2 1203 43.79 41 12.27 125 56.75 12.08 17 .22 9.019.9 PON - 3.3 94 MAY 2 1337 52.09 36 34.53 121 8.59 4.45 14 .07 .3 1.0 PIN 1.2 94 MAY 2 1802 59.26 36 59.50 121 38.92 5.29 26 3 .14 .3 .6 SAR 1.1 94 MAY 2 1820 35.33 37 23.39 121 44.58 6.79 16 .06 .3 .6 ALU 1.0 94 MAY 3 0 31.91 36 29.87 121 4.26 3.85 23 .05 .2 .4 BIT 2.2 94 MAY 3 45 28.05 37 33.50 118 51.28 7.72 10 .11 .7 1.4 MOR 1.2 94 MAY 3 236 13.36 41 13.99 126 3.98 23.42 35 1 .17 2.613.6 PON-- 3.3 94 MAY 3 254 11.94 36 36.72 121 12.20 5.14 11 2 .03 .3 .7 PIN 1.0 94 MAY 3 359 23.31 40 18.20 124 21.50 8.11 10 1 .08 .8 .5 MEN 1.4 94 MAY 3 419 40.95 39 23.55 123 18.02 7.39 15 1 .06 .2 .8 MAA 1.4 94 MAY 3 431 4.38 36 54.42 121 37.85 3.54 22 .10 .3 .6 SJB 1.2 94 MAY 3 539 28.39 40 17.89 124 21.50 8.61 20 1 .11 .6 .3 MEN 2.4 94 MAY 3 550 38.98 39 23.40 123 18.12 7.05 20 2 .08 .2 .7 MAA 1.6 94 MAY 3 641 29.05 35 50.94 121 23.25 3.29 27 2 .08 .6 .5 SSM 1.8 94 MAY 3 806 27.41 37 48.37 118 34.50 0.16 15 1 .18 1.1 2.0 GLA * 2.0 94 MAY 3 921 11.73 37 37.69 118 51.63 3.77 19 3 .08 .3 .5 SMO 1.8 94 MAY 3 1041 16.56 37 36.42 118 52.80 4.38 14 .09 .3 .8 SHE 1.4 94 MAY 3 1057 11.48 40 31.31 126 24.28 16.10 22 1 .2813.217.9 PON - 2.9 94 MAY 3 1139 43.26 40 18.18 124 21.10 7.75 13 1 .11 .7 .4 MEN 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 94 MAY 3 1158 53.10 38 48.34 119 45.53 0.35 13 3 .14 1.1 2.3 WAK 4.0 94 MAY 3 1208 26.74 37 31.85 118 50.00 13.51 18 .13 .6 1.0 MOR 1.4 94 MAY 3 1318 19.70 37 36.39 118 48.15 8.19 9 .16 .7 2.1 HCF 1.1 94 MAY 3 1436 56.13 36 31.82 121 6.64 2.81 25 2 .08 .2 .6 PIN 1.8 94 MAY 3 1447 12.57 37 35.85 118 49.80 4.60 24 3 .10 .3 .5 MOR 1.6 94 MAY 3 1805 0.24 38 49.25 122 48.46 4.52 10 .03 .3 .7 GEY 1.2 94 MAY 3 1858 11.22 40 58.21 123 29.97 22.15 12 3 .11 .4 .9 KLA 1.8 94 MAY 3 2105 33.84 36 29.83 121 4.21 3.99 30 1 .09 .3 .6 BIT 2.1 94 MAY 3 2115 41.79 39 13.95 123 5.36 0.03 31 3 .12 .2 1.3 MAA 2.1 94 MAY 3 2119 44.28 39 13.56 123 4.29 1.91 9 .16 .6 4.9 MAA 1.6 94 MAY 3 2229 22.03 37 9.88 121 35.99 4.17 15 .06 .3 .5 CYN 1.1 94 MAY 4 12 33.55 36 51.79 121 29.58 4.51 10 .14 .6 1.2 BUS 1.1 94 MAY 4 20 1.53 37 0.57 121 43.93 10.94 20 2 .06 .4 .6 SAR 1.1 94 MAY 4 152 40.58 38 48.84 122 48.16 0.04 8 .06 .3 1.8 GEY * 1.4 94 MAY 4 254 3.94 36 47.58 121 30.21 7.18 27 1 .16 .4 .7 SJB 1.0 94 MAY 4 323 31.81 36 33.49 121 4.26 10.05 32 1 .13 .3 .6 BVL 1.8 94 MAY 4 407 32.13 40 30.71 124 30.02 15.96 10 1 .10 1.7 .7 EUR 1.9 94 MAY 4 414 47.52 36 54.02 121 37.20 4.21 25 2 .16 .4 .7 SJB 1.1 94 MAY 4 606 34.04 37 51.97 121 59.81 9.49 72 3 .20 .3 .4 CON 2.2 94 MAY 4 609 27.54 38 49.57 122 27.97 8.40 32 .18 .3 .9 GVL 2.4 94 MAY 4 653 5.18 37 32.56 118 50.08 9.76 30 2 .12 .3 .7 MOR 2.7 94 MAY 4 820 2.07 37 26.14 118 31.10 12.09 15 .06 .3 1.7 CHA 1.8 94 MAY 4 859 24.83 39 3.65 122 33.38 0.04 20 .24 .4 2.5 BAR 1.7 94 MAY 4 951 35.09 36 33.51 121 4.30 10.51 17 .09 .4 .7 BVL .9 94 MAY 4 1103 24.91 40 22.39 122 4.60 18.96 21 1 .23 .6 1.8 SHA 1.7 94 MAY 4 1247 12.96 36 51.78 121 19.56 7.07 63 3 .10 .2 .4 QUI 2.0 94 MAY 4 1546 35.84 40 17.99 124 33.50 21.04 13 1 .08 1.4 .4 MEN 2.3 94 MAY 4 2015 44.01 37 30.07 118 40.08 10.48 7 .03 1.0 2.7 WCS 1.1 94 MAY 4 2042 49.52 40 21.89 124 31.63 14.86 14 .10 1.5 .6 MEN 2.9 94 MAY 4 2153 19.52 38 48.34 122 49.54 1.66 18 .10 .3 .6 GEY 1.7 94 MAY 4 2312 47.91 35 34.44 118 20.43 12.27 11 .11 .5 1.3 WWF 1.7 94 MAY 4 2324 18.09 38 49.73 122 49.45 2.09 7 .01 .3 1.5 GEY 1.2 94 MAY 4 2325 9.36 38 49.46 122 49.88 0.00 12 .16 .4 1.2 GEY * 1.6 94 MAY 4 2329 9.41 36 16.97 120 50.21 8.22 7 .08 .6 1.3 BIT 1.4 94 MAY 5 19 35.07 40 21.07 124 30.28 17.89 14 .12 1.7 .3 MEN 3.0 94 MAY 5 119 44.28 37 34.57 118 50.94 6.53 20 .11 .4 .7 MOR 1.8 94 MAY 5 515 27.59 37 59.02 118 43.47 0.56 21 .10 .810.6 MOL - 2.3 94 MAY 5 538 1.28 38 49.50 122 48.01 4.68 7 .03 .4 2.5 GEY 1.2 94 MAY 5 631 18.14 36 36.41 121 7.55 9.08 51 .18 .3 .7 BVL 2.2 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 24 025711.1* 11.721N 43.017E 10G 5.1 4.8 0.7 11 ETHIOPIA 031740.4* 14.875S 75.952W 33N 4.4 1.2 18 NEAR COAST OF PERU. Felt at Ica. 044015.6 17.137N 120.072E 33N 4.9 3.9 1.0 25 LUZON, PHILIPPINE ISLANDS 060453.8 63.237N 151.335W 10G 0.9 64 CENTRAL ALASKA. ML 3.4 (PMR). 095257.7* 8.923S 30.729E 33N 4.9 4.2 1.1 15 LAKE TANGANYIKA REGION 150306.1 61.613N 149.684W 35* 0.9 73 SOUTHERN ALASKA. ML 3.2 (PMR). APR 25 060025.0 60.808N 150.779W 10G 0.8 12 KENAI PENINSULA, ALASKA. ML 3.1 171617.2? 52.82 N 160.80 W 33N 4.7 2.3 36 SOUTH OF ALASKA 174300.4* 15.436S 167.787E 33N 5.1 0.7 19 VANUATU ISLANDS 222151.1 9.254S 113.042E 62? 5.5 5.0 1.2 38 SOUTH OF JAWA, INDONESIA 222421.9 37.542N 141.609E 46D 4.8 5.0 1.0 54 NEAR EAST COAST OF HONSHU, JAPAN APR 26 033141.7? 9.24 S 113.01 E 33N 4.2 1.5 11 SOUTH OF JAWA, INDONESIA 042921.1* 9.337S 112.793E 33N 5.0 3.9 1.4 20 SOUTH OF JAWA, INDONESIA 072130.3* 53.436N 166.538W 33N 4.6 1.7 20 FOX ISLANDS, ALEUTIAN ISLANDS. ML 4.8 (PMR). 083747.7? 9.37 S 113.01 E 33N 4.9 3.6 1.6 8 SOUTH OF JAWA, INDONESIA 091649.4* 9.306S 112.869E 33N 5.0 0.8 14 SOUTH OF JAWA, INDONESIA 102845.2? 44.28 N 12.99 E 33N 1.2 11 NORTHERN ITALY. ML 4.0 (VIE). 231308.3* 19.252N 145.267E 171 4.7 0.7 32 MARIANA ISLANDS 233645.5 15.943S 167.889E 188D 5.2 0.9 51 VANUATU ISLANDS APR 27 003029.0 48.993N 128.604W 10G 4.3 1.0 48 VANCOUVER ISLAND REGION 012527.9? 20.13 S 174.28 W 33N 4.6 0.9 15 TONGA ISLANDS 013231.6 31.924N 140.725E 33N 4.9 1.2 63 SOUTH OF HONSHU, JAPAN 031413.7 63.048N 150.822W 118* 4.0 0.8 14 CENTRAL ALASKA 040608.6* 9.644S 112.893E 33N 4.3 1.7 5 SOUTH OF JAWA, INDONESIA 041526.6 17.589N 105.445W 33N 4.6 0.9 57 OFF COAST OF JALISCO, MEXICO 082230.0? 9.45 S 112.74 E 33N 5.1 2.0 17 SOUTH OF JAWA, INDONESIA 093923.0 34.309N 118.599W 10G 0.7 37 SOUTHERN CALIFORNIA. ML 3.1 121654.0? 5.72 S 77.38 W 33N 4.9 1.3 15 NORTHERN PERU 123309.2 34.233N 118.811W 15G 1.0 60 SOUTHERN CALIFORNIA. ML 3.8 134957.1* 56.341N 153.108W 33N 3.5 1.6 10 KODIAK ISLAND REGION 172301.6* 5.777S 154.329E 145? 5.4 1.3 29 SOLOMON ISLANDS APR 28 010717.0 63.324N 151.241W 33N 0.5 12 CENTRAL ALASKA. ML 3.5 (PMR). 011045.8* 9.463S 157.304E 33N 5.4 0.4 12 SOLOMON ISLANDS 064445.5* 26.702N 127.402E 33N 4.5 1.2 8 RYUKYU ISLANDS 092958.6 30.226N 138.898E 408D 4.6 1.6 49 SOUTH OF HONSHU, JAPAN 163522.9 33.996N 116.292W 5G 0.7 10 SOUTHERN CALIFORNIA. ML 2.9 164454.0* 39.443S 74.725W 27D 5.6 4.9 1.0 58 OFF COAST OF CENTRAL CHILE 170458.0 34.278N 116.454W 5G 1.1 25 SOUTHERN CALIFORNIA. ML 2.8 173038.5* 35.098N 24.684E 10G 4.2 1.1 24 CRETE 183001.8 45.741N 141.828E 300 4.8 0.9 80 HOKKAIDO, JAPAN REGION APR 29 032858.6& 36.250N 98.090W 5G 8 OKLAHOMA. . mbLg 2.8 (TUL), 3.0 (GS). Felt at Drummond and Enid. 071130.6* 28.296S 63.242W 571D 5.9 0.8 72 SANTIAGO DEL ESTERO PROV., ARG. 133822.4 42.981N 143.043E 100G 4.9 1.0 60 HOKKAIDO, JAPAN REGION 175048.1 42.758N 111.066W 5G 1.3 14 EASTERN IDAHO. ML 3.4 (GS). 182922.1 42.729N 111.061W 5G 1.1 12 EASTERN IDAHO. ML 2.7 (GS). APR 30 032839.7 31.453N 131.262E 33N 5.6 5.4 1.1 93 KYUSHU, JAPAN. Mw 5.8 (HRV). Mo=8.5*10**17 Nm (PPT). Felt (IV JMA) at Miyazaki; (III JMA) at Kagoshima, Kumamoto and Oita. 055730.8 42.750N 111.147W 5G 1.1 11 EASTERN IDAHO. ML 2.6 (GS). 060133.8 61.525N 150.436W 80* 0.6 11 SOUTHERN ALASKA 091418.5* 24.485N 122.154E 33N 4.4 0.9 11 TAIWAN REGION 122648.0 42.105N 124.468W 10G 0.8 17 NEAR COAST OF OREGON. ML 3.3 MAY 01 005937.8 47.370N 149.803E 272D 5.2 0.6 83 NORTHWEST OF KURIL ISLANDS 040322.2? 17.80 N 64.46 W 158* 4.2 0.8 19 VIRGIN ISLANDS 120036.2 36.757N 66.983E 24D 5.9 6.3 0.9 84 HINDU KUSH REGION, AFGHANISTAN. Mw 6.2 (GS), 6.2 (HRV). Mo=1.2*10**18 Nm (PPT). Felt (VI) at Tashiak and Termiz, (V) at Samarqand and (III) at Tashkent, Uzbekistan. 202309.4* 14.448N 91.370W 140D 5.2 1.1 64 GUATEMALA 211720.9* 39.152N 71.771E 33N 5.3 6.2 0.9 33 TAJIKISTAN 212605.6* 10.778N 85.945W 33N 5.0 5.3 1.1 58 COSTA RICA MAY 02 171403.8* 1.232S 97.470E 37D 6.0 5.9 0.9 25 SOUTHWEST OF SUMATERA, INDONESIA 201200.2* 18.684S 69.577W 69D 4.9 0.7 51 NORTHERN CHILE MAY 03 035645.9 13.916N 90.975W 66D 5.0 1.0 78 NEAR COAST OF GUATEMALA 214059.1 8.343S 74.856W 134D 5.2 0.5 56 PERU-BRAZIL BORDER REGION MAY 04 063737 Q 17.1 S 168.3 E 220 5.6 1.0 80 VANUATU ISLANDS MAY 05 051450 Q 64.6 N 17.7 W 10G 5.6 1.1 115 ICELAND 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.