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 September 28 - October 4, 1995 Data and Text prepared by Steve Walter 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, October 4 27, 1995 the U.S. Geological Survey office in Menlo Park recorded 26 earthquakes of magnitude one (M1) and greater within the San Francisco Bay area shown in Figure 1. Only two were as large as M2. This total compares to 25 earthquakes during the previous seven-day period (September 21 - 27) seven of which were as large as M2.0. Although overall it was a quiet week in the area, increased activity was observed in the East Bay, mostly at the M1 level. Earthquakes here extended from the northern Calaveras fault near San Ramon to eastern San Pablo Bay, just south of Mare Island. The largest event was a M2.1 just after midnight on Monday in the Danville area (#4 in figure 1). It had been preceded one hour earlier by a M1.9 beneath eastern San Pablo Bay about five miles south of Vallejo (#3/1). Activity in the South Bay included a pair of M1's on the Black Mountain thrust fault, the largest a M1.9 Wednesday afternoon that was located beneath southwestern Mountain View (#5/1). The only M2 earthquake in the area was a M2.5 last Friday that acaroid along the Calaveras fault about two miles southeast of Hollister (#1/1). To the east, four M1 events occurred east of the Quien Sabe fault, all aftershocks to a M4.2 event on September 22. Northern & Central California It was a very quiet week throughout northern & central California. The Mendocino fracture zone west of Cape Mendocino was the only area to experience increased seismicity during the past week. It consisted of a trio of M2's about 40 miles west of the cape (#1/2), a M2.6 that was another 25 miles farther west (#5/2), and a M3.2 in the southern Gorda Plate about 64 miles west of Eureka (#7/2). The rest of northern California was quiet at the M2 level with the exception of a four M2 events at the Geysers geothermal area and one M2.0 event on the northern Maacama fault about 13 miles north of Willits (#4/2). Central California nearly as quiet. The creeping segment of the San Andreas produced most of the activity with a trio of M2's along the central section north of the Pinnacles National Monument (#3/2), a M2.2 at the southern end (#6/2), and a M2.1 in the Bitterwater area about 15 miles east of King City. The only other earthquake of note was a M2.6 in the Ciervo Hills about 15 miles north of Coalinga (#2/2). Long Valley Caldera Only one M2 earthquake occurred within the caldera during the week, a M2.0 that was located about beneath the Mammoth Lakes road about two miles east of town (#1/3). Activity in the Sierra Nevada terrane south of the caldera declined significantly from that of previous weeks with only two earthquakes as large as M2, the largest a M3.1 about two miles northwest of Mt. Morgan (#2/3). The only other earthquake of note was a M2.1 beneath highway 395 about ten miles west-northwest of Bishop (#3/3). USA Seismicity (September 26 - October 4) The National Earthquake Information Center reported only one notable earthquake in the lower 48 states outside of California. This M3.3 event occurred in the northwest Salmon River Mountains of western Idaho, roughly 100 miles due north of Boise (#1/4). In California the most active area continued to be the Indian Wells Valley about ten miles north of Ridgecrest, site of a M5 earthquake in mid-August. The past week saw at least seven aftershocks as large as M3, including a trio of M3.7 events that were felt in the Ridgecrest area. Slightly farther south, a M3.3 occurred east of Barstow where it was reported to have been felt (#2/4). The Planet Earth (September 26 - October 4) Several damaging quakes struck the planet during the past week including a Ms6.1 in southwestern Turkey that killed at least 82 people and injured over 250 (#1/5). The quake, which was felt strongly in much of western Turkey, was located near the town of Dinar, about 200 miles southwest of Ankara. Over 5,500 houses and buildings were destroyed or damaged in the Dinar area. The earthquake was preceded by a series of foreshocks during the previous week. The largest of these were a pair of M4.7 that caused some injuries and damage in the Dinar/Isparta area. Other events of note in southern Europe included a Mb5.1 in southern Greece that was felt at Kalamata, Sparta, and Arkadhia (#3/5), a Mb5.3 in Gargano region of southern Italy, and a Mb5.0 in the northwestern Balkans. The largest earthquake in the western hemisphere was a Ms6.9 along the Peru-Ecuador border that produced slight damage at Ambato, Riobamba, and Tena, Peru (#5/5). The earthquake was felt throughout most of Ecuador, in northern Peru, and as far north as Bogota, Colombia. One person was reported injured and a large bridge over the Upana River collapsed in Morona Santiago Province. The quake was followed by numerous aftershocks, the largest a Ms6.1 less than 12 hours after the mainshock. Finally, the French government exploded a nuclear device in the Tuamotu Archipelago region, their second nuclear test in less than a month (#4/5). This explosion was apparently larger than the previous explosion having registering as a Mb5.5 earthquake compared to a Mb4.8 for the September 5 explosion. 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 95 SEP 28 750 5.73 40 25.11 125 13.07 5.60 12 .12 5.7 9.9 MEN - 2.4 95 SEP 28 806 20.54 37 32.50 118 48.92 3.97 14 .03 .4 .8 MOR 1.3 95 SEP 28 916 47.15 38 36.27 118 53.14 24.96 29 2 .15 .9 1.6 WAK 2.9 95 SEP 28 1016 50.69 37 32.21 118 48.70 4.32 12 .07 .6 1.0 MOR 1.2 95 SEP 28 1041 20.71 37 32.24 118 49.11 2.77 7 1 .02 1.2 6.6 MOR - 1.0 95 SEP 28 1119 17.78 37 32.63 118 49.33 3.19 10 .04 .6 1.1 MOR 1.1 95 SEP 28 1225 35.87 37 31.43 118 47.03 7.22 12 .05 1.5 1.5 MOR 1.2 95 SEP 28 1229 59.79 39 24.79 121 30.20 8.74 12 1 .05 .4 .8 ORO 1.5 95 SEP 28 1437 26.47 40 56.27 123 18.45 15.74 7 1 .35 1.8 5.6 KLA 1.9 95 SEP 28 1459 7.30 37 38.58 118 56.44 7.64 20 1 .06 .3 .4 SMO 2.0 95 SEP 28 1502 8.34 38 48.10 122 47.93 1.87 10 .04 .3 .4 GEY 1.4 95 SEP 28 1615 41.77 38 49.52 122 47.92 4.88 28 .05 .2 .4 GEY 2.3 95 SEP 28 1720 56.81 36 54.92 121 20.11 8.05 45 1 .08 .2 .5 QUI 1.6 95 SEP 28 1920 48.64 37 33.82 118 51.64 5.06 9 .04 .8 2.3 MOR 1.4 95 SEP 28 2028 42.60 38 45.41 122 41.35 1.67 7 .03 .4 .6 NAP 1.4 95 SEP 28 2037 7.71 37 30.65 118 50.23 0.97 10 .04 1.3 1.2 MOR 1.1 95 SEP 28 2254 20.11 37 22.29 122 11.37 7.20 7 2 .13 1.2 .7 BLM 1.5 95 SEP 28 2254 23.52 37 32.75 118 49.25 2.46 14 .07 .5 1.9 MOR 1.5 95 SEP 28 2313 10.79 38 45.37 122 41.41 1.46 8 1 .06 .4 .7 NAP 1.3 95 SEP 28 2328 10.03 38 49.45 122 47.82 4.47 16 .04 .3 .5 GEY 1.6 95 SEP 29 7 57.87 37 38.74 118 56.22 8.37 18 1 .06 .4 .5 SMO 1.7 95 SEP 29 44 37.13 37 28.78 118 48.86 4.57 10 .04 1.5 1.6 MOR 1.0 95 SEP 29 154 55.05 37 32.22 118 48.42 3.82 9 .06 .7 1.4 MOR 1.2 95 SEP 29 340 25.58 36 20.47 120 21.19 5.08 41 1 .12 .3 .2 COA 2.6 95 SEP 29 343 19.60 37 32.57 118 48.82 1.65 11 .04 .5 1.0 MOR 1.6 95 SEP 29 359 15.05 36 48.64 121 11.94 5.40 47 1 .06 .2 .7 PAN 1.9 95 SEP 29 416 4.71 37 33.04 118 25.70 6.62 9 .03 .4 .5 CHV 1.3 95 SEP 29 609 39.81 37 32.97 118 25.97 6.50 8 .03 .5 .6 CHV 1.0 95 SEP 29 641 5.85 37 33.01 118 25.86 6.81 9 .03 .5 .6 CHV 1.8 95 SEP 29 646 2.86 37 33.05 118 48.86 3.83 18 .10 .4 .8 MOR 2.0 95 SEP 29 658 52.00 37 28.44 118 47.76 1.94 12 .07 2.5 8.2 MOR - 1.3 95 SEP 29 704 40.44 36 50.13 121 22.80 7.98 65 2 .08 .1 .3 HOL 2.5 95 SEP 29 728 6.50 38 49.52 122 47.10 1.53 11 .06 .3 .6 GEY 1.6 95 SEP 29 922 52.13 36 38.33 121 14.87 5.90 70 .07 .1 .3 STN 2.9 95 SEP 29 943 6.18 36 38.34 121 14.93 6.03 58 .06 .1 .3 STN 2.5 95 SEP 29 951 17.64 36 18.09 120 52.88 6.53 38 1 .09 .2 .4 BIT 2.1 95 SEP 29 1152 34.35 36 38.47 121 13.35 5.38 25 .06 .2 .6 STN 1.5 95 SEP 29 1204 8.88 36 38.23 121 15.12 5.87 16 1 .06 .3 .8 STN 1.3 95 SEP 29 1301 49.74 37 10.05 121 59.22 10.72 38 4 .07 .2 .4 LOM 1.5 95 SEP 29 1416 24.63 36 48.75 121 12.06 4.45 20 .06 .3 .9 PAN 1.1 95 SEP 29 1429 10.71 36 48.71 121 12.01 4.52 28 .05 .3 .8 PAN 1.6 95 SEP 29 1539 0.43 37 34.48 118 50.73 9.69 14 1 .05 .4 .8 MOR 1.3 95 SEP 29 1641 42.84 37 28.02 118 49.69 8.74 28 2 .07 .5 .7 MOR 1.9 95 SEP 29 1819 36.59 38 50.08 122 52.69 2.06 7 .04 .4 1.4 GEY 1.2 95 SEP 29 1842 22.22 38 50.75 122 48.78 0.04 7 .11 .5 2.2 GEY * 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 95 SEP 29 2142 38.57 38 49.79 122 55.63 4.26 11 .07 .3 .6 GEY 1.4 95 SEP 29 2344 39.67 37 35.50 118 49.50 2.54 11 .04 .3 .3 MOR 1.7 95 SEP 30 104 11.02 38 47.13 122 45.57 0.92 28 .23 .3 .9 GEY 2.0 95 SEP 30 142 42.96 37 38.34 119 3.17 2.58 8 .02 .4 .7 MAM 1.4 95 SEP 30 156 17.63 36 6.29 120 39.20 7.86 36 2 .09 .2 .3 SLA 1.9 95 SEP 30 304 28.65 38 49.28 122 48.46 3.81 7 .01 .4 .8 GEY 1.2 95 SEP 30 455 54.22 39 31.21 122 0.22 22.26 10 1 .05 2.0 .9 SAC 1.8 95 SEP 30 518 48.49 37 31.86 118 48.02 5.74 13 .09 1.3 1.0 MOR 1.2 95 SEP 30 526 12.03 39 23.66 122 53.53 10.42 18 .04 .3 1.2 BAR 1.9 95 SEP 30 627 59.54 37 31.68 118 48.00 12.84 26 1 .05 .4 .7 MOR 3.1 95 SEP 30 647 2.68 37 31.89 118 48.26 12.74 21 2 .04 .4 .6 MOR 1.5 95 SEP 30 801 30.40 36 57.33 121 38.13 3.36 13 1 .08 .3 .7 SAR 1.0 95 SEP 30 821 39.42 40 22.91 125 6.70 2.79 12 1 .22 4.8 2.3 MEN 2.3 95 SEP 30 1128 45.19 38 46.43 122 44.83 2.32 11 .04 .3 .7 GEY 1.4 95 SEP 30 1136 12.27 37 34.55 118 50.87 9.18 20 .07 .4 .6 MOR 1.4 95 SEP 30 2056 36.32 38 47.56 122 44.97 0.25 13 .10 .3 .9 GEY 1.7 95 SEP 30 2124 35.24 36 35.24 121 11.25 3.26 8 .04 .3 .5 PIN 1.0 95 SEP 30 2143 27.65 37 33.65 118 50.21 1.21 7 .03 1.1 .4 MOR 1.9 95 SEP 30 2327 9.22 37 24.64 121 45.28 8.44 9 .03 .3 .8 ALU 1.1 95 SEP 30 2346 5.46 37 27.82 118 48.51 3.93 7 .04 7.2 2.1 MOR - 1.2 95 OCT 1 729 23.53 39 17.75 122 48.29 2.45 7 .01 .4 4.5 BAR 1.5 95 OCT 1 749 41.13 37 25.25 118 33.97 10.74 13 .08 .8 3.5 RVL 2.1 95 OCT 1 903 5.84 37 40.27 118 50.70 3.18 7 .06 .5 1.8 DOM 1.5 95 OCT 1 920 10.84 37 27.70 121 43.26 3.75 7 .02 .3 1.2 ALU 1.1 95 OCT 1 1018 17.21 37 51.00 122 2.21 11.17 25 2 .09 .3 .4 CON 1.2 95 OCT 1 1113 34.21 39 21.68 123 13.98 7.42 25 2 .06 .2 .9 MAA 1.8 95 OCT 1 1244 15.84 37 47.97 121 57.48 18.81 12 .04 .5 1.1 DAN 1.4 95 OCT 1 1530 55.51 37 32.53 121 40.73 6.17 22 1 .07 .3 .6 HAM 1.4 95 OCT 1 1739 47.74 37 29.34 118 49.52 5.13 10 1 .09 1.1 1.4 MOR 1.3 95 OCT 1 1934 19.55 37 30.66 118 49.61 2.41 10 1 .04 3.1 6.2 MOR - 1.2 95 OCT 1 1937 27.17 38 47.23 122 46.40 4.33 44 .18 .3 .6 GEY 2.7 95 OCT 1 2042 10.76 39 35.64 123 24.92 6.69 16 .08 .3 .6 MAA 1.9 95 OCT 2 201 50.49 38 54.69 123 0.25 2.45 10 .07 .3 4.0 MAA 1.6 95 OCT 2 859 3.84 37 45.01 121 58.27 9.70 18 1 .09 .3 .7 DAN 1.4 95 OCT 2 903 17.45 38 47.76 122 44.93 1.29 21 .08 .2 .6 GEY 2.1 95 OCT 2 951 43.15 38 47.44 122 45.39 1.36 9 .04 .3 .8 GEY 1.6 95 OCT 2 1032 13.75 38 46.12 122 43.43 1.71 28 .17 .3 .6 GEY 2.4 95 OCT 2 1118 27.90 39 21.13 122 50.52 7.02 13 .03 .3 1.9 BAR 1.6 95 OCT 2 1400 59.48 37 54.90 122 3.16 5.29 14 1 .16 .4 .9 CON 1.3 95 OCT 2 1503 50.69 38 49.21 122 48.65 3.71 18 .08 .2 .7 GEY 1.9 95 OCT 2 1550 14.11 37 45.18 121 58.25 8.96 18 1 .08 .3 .6 DAN 1.3 95 OCT 2 1627 3.50 38 49.59 122 47.66 3.81 7 .01 .4 .9 GEY 1.4 95 OCT 2 1627 55.71 38 49.30 122 47.81 3.76 7 .05 .4 .8 GEY 1.2 95 OCT 2 1816 55.32 36 35.89 121 3.22 7.62 12 .10 .5 1.0 PAN 1.4 95 OCT 2 1836 13.08 36 35.31 121 11.78 7.48 11 .02 .4 .8 PIN 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 95 OCT 2 1855 25.24 37 55.01 122 2.90 5.66 16 2 .16 .4 .9 CON 1.5 95 OCT 3 9 44.44 38 47.56 122 46.93 0.52 9 .05 .3 .7 GEY 1.6 95 OCT 3 10 34.60 38 47.56 122 46.95 0.90 8 .06 .4 .7 GEY 1.5 95 OCT 3 150 17.53 37 33.72 121 42.18 5.42 12 1 .06 .3 .5 HAM 1.2 95 OCT 3 533 28.19 37 29.01 118 49.93 0.93 9 .06 1.4 7.6 MOR - 1.7 95 OCT 3 650 2.59 37 42.85 121 59.70 3.96 16 2 .08 .5 .6 DAN 1.4 95 OCT 3 813 18.62 38 2.94 122 15.94 6.67 45 3 .18 .3 .5 CON 1.9 95 OCT 3 913 4.94 37 49.47 121 57.45 15.35 56 1 .09 .2 .3 DAN 2.1 95 OCT 3 1011 19.92 36 34.55 121 11.02 7.14 14 .09 .5 .9 PIN 1.4 95 OCT 3 1022 14.82 35 57.85 120 30.42 5.94 12 .02 .6 .4 MID 1.9 95 OCT 3 1250 19.50 40 15.14 122 28.62 23.68 11 .06 .6 .8 KLA 2.0 95 OCT 3 1305 7.12 36 33.92 121 9.30 2.81 24 .06 .2 .5 PIN 2.0 95 OCT 3 2038 31.49 37 33.56 118 26.50 6.64 8 .04 .4 .6 CHV 1.9 95 OCT 3 2218 36.95 37 31.43 118 48.70 3.73 13 .04 .5 1.4 MOR 1.8 95 OCT 3 2231 6.94 36 34.80 121 10.84 7.78 29 .07 .2 .5 PIN 2.2 95 OCT 3 2309 5.34 40 16.98 125 0.46 1.12 8 .2210.215.0 MEN - 2.4 95 OCT 3 2331 36.29 36 45.35 121 15.76 8.27 12 .05 .5 1.0 PAI 1.3 95 OCT 4 0 8.13 37 38.84 118 50.02 5.83 9 .10 .5 .9 HCF 1.4 95 OCT 4 24 43.34 37 38.93 118 50.01 6.09 8 .09 .6 .7 HCF 1.7 95 OCT 4 139 7.48 37 38.61 118 50.28 7.44 9 .04 .6 .7 HCF 1.5 95 OCT 4 307 2.61 36 49.09 121 12.32 5.15 14 .04 .4 1.1 PAN 1.4 95 OCT 4 333 9.16 40 24.41 125 42.56 6.20 25 .16 5.015.2 MEN - 2.6 95 OCT 4 339 4.95 36 2.00 120 35.00 5.28 41 2 .08 .2 .3 SLA 2.2 95 OCT 4 357 26.70 37 38.92 118 50.14 6.76 8 .08 .6 .9 HCF 1.4 95 OCT 4 404 21.20 40 48.57 125 23.81 5.06 57 .13 1.412.6 DEL - 3.2 95 OCT 4 558 57.10 36 49.26 121 29.58 15.39 11 .14 1.2 1.4 SJB 1.1 95 OCT 4 1252 38.79 35 31.99 118 25.24 9.62 15 .07 .3 .9 WWF 1.9 95 OCT 4 1710 39.08 36 5.24 120 13.61 10.49 7 .14 1.0 1.8 COA 1.8 95 OCT 4 1843 39.09 37 35.46 118 29.10 9.49 9 .08 .6 1.4 CHV 2.0 95 OCT 4 1918 11.33 37 35.40 118 29.06 8.84 9 .02 .4 1.1 CHV 2.0 95 OCT 4 2139 10.94 37 21.10 122 5.83 1.08 7 .15 3.8 1.5 DR 1.9 95 OCT 5 11 32.43 38 47.44 122 45.75 3.22 20 .13 .2 .8 AP 1.9 95 OCT 5 223 41.09 37 27.86 118 48.63 7.14 7 .03 1.6 2.8 CR 1.2 95 OCT 5 650 9.97 36 47.57 121 29.27 11.92 17 .20 .6 1.1 BR 1.1 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 ------------------------------------------------------------------------------ SEP 26 002403.7% 32.788S 70.865W 80G 0.2 9 CHILE-ARGENTINA BORDER. MD 2.2 002957.7* 4.266S 152.828E 33N 4.7 0.8 42 NEW BRITAIN REGION, P.N.G. 045513.4? 51.36 N 176.80 W 50G 4.0 0.7 15 ANDREANOF ISLANDS, ALEUTIAN IS. 051456.7& 58.380N 152.140W 38 49 KODIAK ISLAND REGION. ML 3.3 064309.2 2.884N 78.143W 33N 4.7 1.0 24 NEAR WEST COAST OF COLOMBIA 081057.0& 59.670N 152.350W 78 13 SOUTHERN ALASKA. . 144155.4& 63.590N 147.570W 83 55 CENTRAL ALASKA. . 145808.0* 37.761N 30.430E 33N 4.7 4.1 1.4 85 TURKEY 173639.2* 36.126N 3.956E 10G 0.7 18 NORTHERN ALGERIA 183149.6 12.992S 166.842E 200G 4.7 0.2 7 SANTA CRUZ ISLANDS 205644.9 38.567N 4.857W 10G 0.8 9 SPAIN. mbLg 2.5 (MDD). 211038.3 44.874N 116.071W 5G 0.8 17 WESTERN IDAHO. ML 3.3 (GS). 223238.3 26.357S 177.665W 165D 5.0 0.9 70 SOUTH OF FIJI ISLANDS SEP 27 012729.0 6.468S 145.672E 33N 5.2 0.6 30 NEW GUINEA, PAPUA NEW GUINEA 020515.3* 14.835S 167.130E 33N 5.1 1.2 16 VANUATU ISLANDS 020523.6? 26.35 N 128.98 E 33N 5.1 1.2 19 RYUKYU ISLANDS 042225.3& 63.460N 149.380W 102 74 CENTRAL ALASKA. . 060707.3% 31.538S 69.829W 150G 0.3 10 SAN JUAN PROV., ARGENTINA. MD 3.6 070520.0% 33.932S 71.357W 50G 0.2 8 NEAR COAST OF CENTRAL CHILE 082146.1* 11.343S 77.660W 56D 4.6 1.3 28 NEAR COAST OF PERU. Felt (IV) at Chancay, Huacho, Huaral and Lima; (III) at Barranca, Canta, Mala and Matucana; (II) at Huarmey, San Mateo and San Vicente de Canete. 112914.4% 32.982S 70.719W 80G 0.2 10 CHILE-ARGENTINA BORDER. MD 3.0 132543.0% 32.811S 71.690W 50G 0.4 10 NEAR COAST-CENTRAL CHILE. MD 3.0 141556.9* 38.080N 30.224E 33N 4.7 4.5 1.1 61 TURKEY 145049.4 34.218N 116.377W 5G 0.6 10 SOUTHERN CALIFORNIA. ML 2.7 Felt. 185132.6% 34.291S 70.601W 100G 0.1 10 CHILE-ARGENTINA BORDER. MD 2.2 213946.6% 33.791S 70.807W 80G 0.3 7 CHILE-ARGENTINA BORDER SEP 28 001101.5? 27.94 N 139.68 E 501? 4.3 0.3 5 BONIN ISLANDS REGION 002529.3 35.751N 117.637W 5G 0.9 41 CENTRAL CALIFORNIA. ML 3.1 (GS). MD 3.1 (PAS). Felt at Ridgecrest. 045114.0? 14.55 N 91.13 W 33N 3.9 0.4 7 GUATEMALA 061725.8 38.076N 22.105E 33N 4.7 1.0 63 GREECE. ML 5.1 (ROM). 083234.5* 44.529N 80.355E 33N 4.6 0.9 17 KAZAKHSTAN-XINJIANG BORDER REG. 093504.4 35.711N 117.581W 5G 0.9 58 CENTRAL CALIFORNIA. ML 3.7 (GS). 100350.2% 32.396S 71.892W 33N 0.9 11 NEAR COAST-CENTRAL CHILE. MD 3.8 113627.6 35.780N 117.575W 5G 0.9 56 CENTRAL CALIFORNIA. ML 3.7 (GS). 115744.6 14.334N 92.456W 33N 4.7 0.7 43 NEAR COAST OF CHIAPAS, MEXICO 150253.4 36.973N 3.760W 10G 1.0 15 STRAIT OF GIBRALTAR. mbLg 3.4 151112.1% 32.616S 70.857W 68? 0.3 8 CHILE-ARGENTINA BORDER. MD 2.6 234442.2 42.655N 18.137E 10G 5.0 1.2 152 NORTHWESTERN BALKANS. ML 5.0 SEP 29 034025.8 36.378N 120.327W 5G 0.9 31 CENTRAL CALIFORNIA. ML 2.7 (GS). 040924.0* 20.786S 174.111W 33N 4.8 5.2 1.0 28 TONGA ISLANDS 092252.1 36.593N 121.294W 5G 0.6 50 CENTRAL CALIFORNIA. ML 2.7 (GS). 133238.1* 35.959S 103.576W 10G 4.8 5.2 1.2 19 SOUTHERN PACIFIC OCEAN SEP 30 044158.1* 18.677N 145.612E 167D 4.7 1.2 14 MARIANA ISLANDS 062759.4 37.552N 118.796W 5G 0.8 36 CALIFORNIA-NEVADA BORDER. ML 3.0 073820.2* 14.494N 93.110W 33N 4.7 0.9 30 NEAR COAST OF CHIAPAS, MEXICO 100254.9% 34.307S 70.627W 100G 0.2 11 CHILE-ARGENTINA BORDER. MD 3.7 101434.2 41.777N 15.901E 33N 5.3 5.2 0.8 102 SOUTHERN ITALY. ML 4.8 (ROM). 104756.3 50.703N 157.406E 33N 5.8 5.5 0.8 156 KURIL ISLANDS 124004.2% 34.494S 70.727W 100G 0.5 9 CHILE-ARGENTINA BORDER. MD 2.6 124638.1 34.930N 116.752W 10G 0.7 36 SOUTHERN CALIFORNIA. ML 3.3 (GS). Felt at Barstow. 135635.7 51.849N 143.073E 33N 5.1 0.6 55 SAKHALIN ISLAND 185729.0% 31.249S 69.152W 200G 0.4 10 SAN JUAN PROV., ARGENTINA. MD 3.7 OCT 01 062238.8 36.911N 21.370E 33N 5.1 0.9 46 SOUTHERN GREECE. ML 4.5 (THE). Felt at Kalamata and Sparta. Also felt in Arkadhia. 125015.4 31.356S 71.023W 65D 5.4 0.9 65 NEAR COAST-CENTRAL CHILE. Felt (III) at Illapel, Ovalle and Vicuna. 150417.5* 52.159N 168.009W 33N 4.4 1.4 27 FOX ISLANDS, ALEUTIAN ISLANDS 155715.7 38.037N 30.153E 33N 5.9 6.1 0.8 133 TURKEY. Mw 6.0 (GS), 6.3 (HRV). Eighty-two people confirmed killed, 250 injured and 5,500 houses and buildings destroyed or damaged in the Dinar area. Felt strongly in much of western Turkey. 163027.3 35.705N 117.673W 5G 0.9 38 CENTRAL CALIFORNIA. ML 3.2 (GS). 163829.4* 17.588S 178.767W 500G 4.8 0.6 25 FIJI ISLANDS REGION 170602.4 29.203N 139.011E 424D 5.6 0.8 117 SOUTH OF HONSHU, JAPAN. Mw 6.1 180258.9* 37.753N 30.092E 33N 5.1 1.2 22 TURKEY 212752.5 35.022N 118.982W 10G 0.7 52 CENTRAL CALIFORNIA. ML 2.9 (GS). 232957.8 22.287S 138.788W 0G 5.5 0.6 82 TUAMOTU ARCHIPELAGO REGION. Underground nuclear explosion. 234223.5 35.711N 117.623W 5G 0.9 49 CENTRAL CALIFORNIA. ML 3.2 (GS). OCT 02 001053.1 35.774N 117.620W 5G 0.8 56 CENTRAL CALIFORNIA. ML 3.7 (GS). 013546.5 67.058N 178.614E 10G 5.3 4.8 0.7 76 NEAR N. COAST OF EASTERN SIBERIA 234822.5 15.261S 174.995W 33N 5.4 5.7 0.8 60 TONGA ISLANDS. Mw 6.0 (GS), OCT 03 010020.8* 13.727S 171.224W 33N 4.8 0.4 31 SAMOA ISLANDS 013324.6 35.766N 117.629W 5G 0.8 48 CENTRAL CALIFORNIA. ML 3.5 (GS). 015125.1 2.705S 77.862W 33N 6.4 6.9 0.8 136 PERU-ECUADOR BORDER. Mw 6.8 (GS), 7.0 (HRV). Slight damage occurred at Ambato, Riobamba and Tena. Felt in many parts of Ecuador. Felt in Colombia as far north as Bogota. Also felt in western Peru. 015702.8* 2.705S 77.775W 33N 5.6 0.7 42 PERU-ECUADOR BORDER. Felt. 062726.6 2.709S 77.747W 33N 5.2 0.7 59 PERU-ECUADOR BORDER 063147.3* 2.761S 77.804W 33N 4.9 0.7 21 PERU-ECUADOR BORDER 073812.2* 37.905N 30.313E 33N 4.9 1.2 14 TURKEY 093054.2? 2.49 S 77.63 W 33N 4.9 0.8 26 PERU-ECUADOR BORDER 100701.1* 2.564S 77.701W 33N 4.9 0.7 26 PERU-ECUADOR BORDER 124459.6 2.780S 77.787W 33N 5.8 6.1 0.7 89 PERU-ECUADOR BORDER. Mw 6.4 Felt in the Cuenca area. 160817.7 30.501S 71.626W 33N 5.3 5.2 0.8 61 NEAR COAST-CENTRAL CHILE 170059.9 2.739S 77.731W 24D 4.9 0.8 39 PERU-ECUADOR BORDER 180427.2 2.573S 77.434W 33N 4.7 0.8 23 PERU-ECUADOR BORDER 220006.8 32.979N 116.376W 10G 0.7 24 CALIF.-BAJA CALIF. BORDER ML 2.8 OCT 04 151234 Q 52.8 N 172.5 E 33N 5.6 1.0 98 NEAR ISLANDS, ALEUTIAN ISLANDS 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.