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 October 3 - 9, 1996 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 October 9, 1996 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. Seven were as large as M2. This total compares to 20 earthquakes during the previous seven-day period (September 26 - October 2), three of which were as large as M2. The increased number of M2 earthquakes was due to a small cluster of events on the creeping segment of the San Andreas fault about three miles south of San Juan Bautista, six of which were as large as M2 (#1/1). Two occurred last Thursday morning, three more on Monday night, and the final event on Tuesday evening. None were reported to have been felt although those larger than M2.5 may well have been. The only other notable earthquake occurred last Thursday evening on the Marsh Creek Fault about five miles southwest of Brentwood (#2/1). It was followed by a slightly smaller M1.9 in the same location on Monday evening. Northern & Central California It was a relatively quiet week in the region, the exception being a M4.2 that occurred in western Nevada about 22 miles south of Tonopah Junction (#8/2). Otherwise the largest earthquake in northern & central California was a M3.0 on the creeping segment of the San Andreas near the Pinnacles National Monument (#5/2). Northern California was equally quiet with less than half a dozen M2's along the Mendocino fracture zone, the largest a M2.8 early Sunday morning (#2/2). A pair of 23-km-deep subduction zone events occurred onshore of Cape Mendocino, the first about 22 miles southeast of Fortuna (#1/2), the second about 30 miles north of Hayfork (#7/2). The Coast Range experienced a pair of M2's along the Maacama fault, the largest a M2.4 on Sunday morning that was located about eight miles southeast of Laytonville (#6/2). A similar sized event occurred earlier that morning on the Green Valley fault about 12 miles west of Winters (#4/2). Activity in the eastern Sierra Nevada was limited to four M2's about 17 miles north of Truckee (#9/2) and a M2.3 just south of Lake Almanor (#3/2). Long Valley Caldera Only one M2 earthquake occurred within the caldera during the week, a M2.0 early Tuesday morning that was located about one mile southeast of Casa Diablo Hot Springs (#3/3). South of the caldera five small M2 events occurred near Lake Dorothy (#2/3) and a M2.08 occurred northeast of Mt. Morrison (#1/3). USA Seismicity (September 30 - October 10) The largest earthquakes in the region during the past week occurred off the west coast. Last Thursday and Friday a pair of M4 earthquakes occurred along the Blanco fracture zone west of the central Oregon coast (#1/4). On Saturday a M6.0 earthquake rocked offshore of Vancouver Island, about 230 miles west of Vancouver, British Columbia (#6/4). It was followed within 24 hours by three aftershocks as large as M4, the largest a M5.2 aftershock that followed the mainshock by half an hour. Other domestic quakes of note include the M4.2 western Nevada quake discussed above (#5/4, #8/2), a M3.2 Northridge aftershock (#2/4), and a M3.1 southeast of the Salton Sea (#4/4). The Planet Earth (September 30 - October 10) The largest earthquake on the planet was a M6.8 in the eastern Mediterranean Sea, just south of the Island of Cyprus (#6/5). The earthquake was strongly felt in Cyprus, Israel, Lebanon, Turkey, Egypt, and Syria. One fatality was reported in both Cyprus and Egypt and several injuries were reported in Cyprus. Moderate earthquakes of note included a M5.5 near the east coast of Kamchatka (#1/5), a M5.3 in the western Caribbean Sea (#2/5), and M5 events on both the Southwest and Southeast Indian Ridges (#3,#5/5). 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 OCT 3 713 22.22 37 10.08 122 8.83 7.75 24 1 .15 .4 .8 ANN 1.7 96 OCT 3 1237 7.22 38 56.69 123 2.73 6.07 22 .07 .2 .9 MAA 1.9 96 OCT 3 1244 22.27 36 2.53 120 35.17 4.40 19 3 .08 .4 .5 SLA 1.5 96 OCT 3 1357 8.06 36 48.96 121 32.05 5.03 76 3 .21 .2 .4 SJB 2.7 96 OCT 3 1409 4.19 38 54.13 123 1.00 2.11 7 .07 .4 8.9 MAA - 1.2 96 OCT 3 1436 42.08 36 49.06 121 31.65 2.24 22 .18 .4 .7 SJB 1.4 96 OCT 3 1509 22.21 38 48.45 122 48.96 3.83 7 .03 .4 .9 GEY 1.2 96 OCT 3 1728 9.39 38 32.94 118 1.57 2.83 24 1 .28 4.3 6.5 NEV # 2.5 96 OCT 3 1751 59.46 37 53.56 118 12.20 0.58 20 .09 2.7 9.1 NEV - 2.2 96 OCT 3 1808 57.79 38 45.38 119 35.57 7.85 13 .08 .6 1.5 WAK 2.2 96 OCT 3 1826 56.68 38 49.63 122 47.65 3.74 8 .03 .4 .9 GEY 1.3 96 OCT 3 1832 16.33 36 48.02 121 32.19 8.31 80 3 .19 .2 .4 SJB 2.6 96 OCT 3 1929 24.91 36 48.33 121 31.27 8.60 11 .12 .6 1.6 SJB .9 96 OCT 3 1942 31.49 39 34.39 120 8.89 4.59 14 2 .13 .9 2.1 WAK 2.5 96 OCT 3 1953 30.60 38 47.81 122 44.53 1.39 10 1 .07 .2 .9 GEY 1.5 96 OCT 3 2202 24.68 36 28.14 121 2.51 7.60 45 .07 .2 .4 BIT 2.2 96 OCT 3 2212 44.11 38 47.63 122 44.41 2.72 7 .02 .4 1.3 GEY 1.4 96 OCT 3 2237 10.14 36 22.83 121 0.98 1.07 12 .16 .6 1.1 BIT# 2.0 96 OCT 4 18 20.78 37 52.15 121 44.13 0.01 8 2 .45 4.2 2.6 GRN # 2.1 96 OCT 4 36 29.26 36 28.20 121 2.57 7.40 41 .08 .2 .5 BIT 2.0 96 OCT 4 39 50.89 37 34.41 118 50.51 3.17 34 1 .08 .2 .9 MOR 2.9 96 OCT 4 144 0.22 39 1.78 123 22.39 2.14 7 .09 .4 9.8 PAR - 1.5 96 OCT 4 359 7.79 38 3.37 118 52.04 2.73 20 3 .11 .3 2.4 MOL 1.7 96 OCT 4 545 27.66 37 34.01 118 50.57 7.27 19 1 .09 .4 .8 MOR 1.1 96 OCT 4 607 47.37 37 34.26 118 50.16 1.27 8 .07 .8 .4 MOR .9 96 OCT 4 632 3.04 36 54.70 121 20.04 8.52 53 .09 .2 .5 QUI 1.9 96 OCT 4 722 54.10 37 37.22 119 0.15 5.16 17 .10 .5 .8 MAM 1.2 96 OCT 4 740 2.57 38 46.31 122 43.90 2.68 16 .07 .3 .5 GEY# 1.7 96 OCT 4 740 32.78 38 46.25 122 43.96 1.99 8 1 .05 .4 .6 GEY 1.4 96 OCT 4 940 31.76 36 27.13 121 0.52 2.00 14 .11 .5 1.4 BIT 1.0 96 OCT 4 1033 17.07 40 19.09 124 29.77 9.88 7 .04 1.8 .8 MEN 1.7 96 OCT 4 1104 49.41 40 29.88 123 45.21 22.65 15 .05 .3 .5 EUR 2.0 96 OCT 4 1324 26.82 37 13.01 121 36.67 3.59 14 2 .07 .3 .8 SFL 1.1 96 OCT 4 1403 39.40 37 31.90 118 52.69 6.22 30 .09 .3 .6 MOR 2.3 96 OCT 4 1418 29.03 37 31.89 118 52.58 6.51 16 2 .14 .6 .9 MOR # 1.4 96 OCT 4 1427 36.88 37 31.86 118 52.74 6.84 28 .06 .3 .5 MOR 1.9 96 OCT 4 1611 42.54 36 34.21 121 9.80 3.45 13 .05 .3 .6 PIN 1.0 96 OCT 4 1659 11.59 39 1.52 122 32.24 12.57 7 .13 .9 1.9 BAR 1.1 96 OCT 4 1854 22.77 37 40.94 118 51.12 2.61 7 .04 .5 1.1 DOM 1.1 96 OCT 4 1908 8.47 37 39.14 118 52.36 5.30 25 .08 .3 .4 DOM 1.6 96 OCT 4 1910 13.41 37 32.06 118 52.39 6.58 11 .12 .5 .9 MOR 1.0 96 OCT 4 1953 13.95 37 39.13 118 52.42 5.31 22 .08 .3 .5 DOM 1.6 96 OCT 4 2004 52.16 36 44.97 121 15.15 6.14 25 1 .05 .2 .5 PAI 1.5 96 OCT 4 2236 31.72 37 32.41 118 49.82 6.96 12 .08 .4 .8 MOR 1.0 96 OCT 5 40 59.57 40 22.00 124 34.66 27.06 16 1 .07 1.3 .9 MEN 2.3 --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 OCT 5 44 49.84 37 56.15 118 36.59 9.84 10 .06 .5 1.4 MOL 1.6 96 OCT 5 54 32.83 37 38.33 118 57.50 9.55 21 .07 .3 .6 SMO 1.6 96 OCT 5 544 14.18 40 21.18 124 22.76 16.58 12 1 .10 .6 .4 MEN 2.4 96 OCT 5 724 40.78 38 48.70 122 47.20 0.98 25 .07 .2 .3 GEY 2.1 96 OCT 5 730 10.30 37 30.44 118 45.40 8.47 15 .04 .4 .9 WCN 1.1 96 OCT 5 1214 16.49 40 8.69 121 3.78 4.00 21 1 .19 1.0 4.9 ALM 2.4 96 OCT 5 1506 4.80 37 31.67 118 52.53 6.94 10 .07 .4 .8 MOR 1.2 96 OCT 5 1535 38.15 37 7.07 121 31.75 7.13 27 .07 .3 .5 CYN 1.4 96 OCT 5 1722 30.29 37 31.74 118 52.88 6.57 23 .08 .3 .6 MOR 2.1 96 OCT 5 1723 45.22 37 31.73 118 52.77 6.14 25 .09 .3 .7 MOR 2.2 96 OCT 5 1726 1.77 37 31.76 118 52.72 6.22 21 .08 .3 .6 MOR 2.1 96 OCT 5 1727 5.74 37 31.78 118 52.56 6.90 16 .12 .4 .8 MOR 1.3 96 OCT 5 1728 9.48 37 32.33 118 52.40 4.76 17 .10 .5 1.0 MOR 1.8 96 OCT 5 1733 49.84 37 31.57 118 52.82 4.76 22 .07 .3 .4 MOR 2.0 96 OCT 5 1734 40.45 37 31.75 118 52.87 6.74 17 .06 .3 .5 MOR 1.6 96 OCT 5 1826 13.82 36 38.67 121 15.49 6.52 25 .07 .2 .6 STN 1.5 96 OCT 5 1837 9.14 36 33.97 121 9.44 6.66 37 1 .07 .2 .5 PIN 1.8 96 OCT 5 1845 38.01 37 31.78 118 52.64 7.27 15 .08 .3 .7 MOR 1.4 96 OCT 5 1928 19.82 36 25.07 120 59.52 6.11 14 .05 .4 .7 BIT 1.2 96 OCT 5 2031 20.24 37 32.42 118 52.29 5.46 13 .10 .4 .9 MOR 1.5 96 OCT 5 2110 27.08 36 48.90 121 32.26 8.68 13 1 .07 .5 1.1 SJB# 1.1 96 OCT 5 2254 40.62 37 50.50 121 55.75 16.88 39 2 .08 .3 .5 DAN 1.9 96 OCT 5 2302 21.00 38 48.25 122 46.53 2.16 7 .03 .4 .6 GEY 1.3 96 OCT 5 2332 10.60 39 34.56 123 25.89 5.90 11 .06 .3 .8 MAA 1.4 96 OCT 6 142 0.43 38 7.93 119 25.97 3.11 7 4 .12 4.0 9.0 WAK - 1.7 96 OCT 6 208 54.85 35 45.21 118 18.51 13.00 8 .06 .6 1.1 WWF 1.5 96 OCT 6 240 31.94 38 48.82 122 48.43 1.13 7 .03 .3 .3 GEY 1.4 96 OCT 6 258 3.36 39 34.79 120 10.02 0.02 14 1 .18 1.2 1.6 WAK # 2.2 96 OCT 6 335 51.95 37 23.04 122 16.93 11.35 21 1 .09 .3 .6 BLM 1.2 96 OCT 6 342 5.23 37 36.68 118 49.87 5.59 19 .10 .3 1.0 HCF 1.6 96 OCT 6 545 20.86 36 16.78 120 27.00 10.76 9 2 .04 .5 .8 COA 1.2 96 OCT 6 643 50.54 36 32.53 121 7.78 7.28 21 1 .04 .2 .5 PIN 1.1 96 OCT 6 650 13.95 36 59.66 121 47.07 15.93 33 2 .06 .3 .4 LOM 1.4 96 OCT 6 739 36.63 40 34.63 124 50.13 21.16 15 .10 2.0 1.7 EUR 2.3 96 OCT 6 742 21.92 40 35.98 124 47.86 9.29 47 .13 1.0 1.2 EUR 2.8 96 OCT 6 923 25.13 36 28.87 121 3.29 5.25 24 .05 .2 .5 BIT 1.3 96 OCT 6 1006 2.24 38 32.61 122 11.53 8.29 48 2 .23 .3 .6 GVL 2.4 96 OCT 6 1028 46.88 37 15.20 121 38.07 6.00 9 .07 .4 2.0 SFL 1.1 96 OCT 6 1047 1.65 37 55.32 118 10.35 1.58 16 1 .08 1.4 1.8 NEV 2.0 96 OCT 6 1252 39.80 36 32.67 121 7.72 5.81 67 2 .07 .1 .4 PIN 2.9 96 OCT 6 1624 57.17 38 49.29 122 48.48 2.09 7 .02 .4 .9 GEY 1.2 96 OCT 6 1700 7.77 40 6.66 123 28.44 2.36 8 .13 1.1 1.6 MEN 1.3 96 OCT 6 1753 22.06 39 34.74 123 26.97 5.72 21 .07 .2 .4 MAA 2.4 96 OCT 6 1806 2.97 38 47.73 122 45.06 0.89 11 .05 .2 .8 GEY# 1.6 96 OCT 6 1902 33.77 37 31.55 118 52.82 6.79 14 .06 .3 .5 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 OCT 6 1909 2.27 37 31.33 118 52.54 7.31 11 1 .06 .4 .6 MOR 1.1 96 OCT 6 1909 28.06 37 31.90 118 53.10 5.74 7 .03 1.3 2.3 MOR 1.0 96 OCT 6 1912 23.90 37 31.87 118 52.73 6.11 12 2 .06 .4 .5 MOR 1.1 96 OCT 6 2022 21.07 37 31.70 118 52.85 6.55 19 .07 .3 .8 MOR 1.7 96 OCT 6 2026 4.03 37 31.80 118 52.59 6.66 19 .09 .3 .6 MOR 1.7 96 OCT 6 2030 23.55 38 24.69 122 35.43 0.29 25 1 .29 .6 4.3 ROG 1.9 96 OCT 6 2040 20.14 36 56.62 121 41.10 10.73 33 .09 .3 .6 SJB 1.3 96 OCT 6 2050 41.03 38 46.35 122 42.95 2.53 9 .06 .5 .5 GEY 1.5 96 OCT 6 2240 41.95 37 31.95 118 52.51 2.05 8 .03 .7 7.3 MOR - 1.1 96 OCT 7 457 44.63 38 47.63 122 46.73 0.44 20 .06 .2 .5 GEY# 2.4 96 OCT 7 625 15.33 37 47.36 119 0.08 2.32 13 1 .09 .3 2.3 INC # 1.2 96 OCT 7 712 15.70 37 31.49 118 52.70 6.86 19 .05 .3 .5 MOR 1.5 96 OCT 7 801 29.60 36 47.72 121 24.56 4.31 23 2 .17 .3 .8 HOL 1.3 96 OCT 7 803 56.43 37 44.26 122 32.94 12.33 12 1 .04 .6 1.1 SFP 1.4 96 OCT 7 841 30.83 37 34.93 118 49.18 7.10 20 1 .06 .3 1.0 MOR 1.5 96 OCT 7 901 31.54 37 34.99 118 49.22 6.67 18 2 .07 .3 1.0 MOR 1.0 96 OCT 7 901 31.54 37 35.12 118 49.16 6.19 18 1 .07 .3 1.1 MOR 1.1 96 OCT 7 1219 7.05 36 33.76 121 5.95 1.48 16 .09 .3 .9 BVL 1.4 96 OCT 7 1240 41.20 36 33.74 121 5.81 1.23 10 .09 .3 1.5 BVL 1.1 96 OCT 7 1316 20.29 38 55.34 122 35.49 4.02 7 .09 .7 2.4 BAR 1.4 96 OCT 7 1459 49.12 40 56.38 123 25.73 22.98 11 1 .10 .5 1.3 KLA 2.1 96 OCT 7 1547 21.62 37 44.40 121 56.14 8.27 8 1 .08 .5 1.7 DAN .8 96 OCT 7 1620 8.31 38 47.46 122 44.25 1.65 7 .02 .3 .9 GEY 1.3 96 OCT 7 1718 13.54 36 34.03 121 9.45 5.62 23 .08 .3 .7 PIN 1.4 96 OCT 7 1746 10.84 38 48.84 122 48.07 3.74 17 .03 .2 .5 GEY 1.8 96 OCT 8 32 33.33 38 47.71 122 44.46 1.40 19 .05 .2 .5 GEY 2.0 96 OCT 8 121 45.23 37 51.80 121 44.01 0.02 8 .45 5.1 4.8 GRN # 2.0 96 OCT 8 145 42.70 37 28.22 118 49.21 7.33 20 .08 .4 .9 MOR 1.3 96 OCT 8 346 54.11 37 34.07 118 49.96 3.99 25 .08 .3 .6 MOR 1.9 96 OCT 8 348 16.91 37 3.74 120 50.67 0.03 18 2 .29 .7 1.4 JQN # 1.6 96 OCT 8 412 14.97 36 32.41 121 7.39 2.82 22 .06 .2 .6 PIN 1.8 96 OCT 8 421 3.13 37 32.06 118 52.53 4.21 15 .05 .4 1.0 MOR 1.5 96 OCT 8 453 35.21 37 5.92 120 51.19 2.81 7 .07 1.4 8.3 JQN - 1.6 96 OCT 8 521 25.08 38 47.70 122 47.74 1.46 8 .03 .3 .5 GEY 1.3 96 OCT 8 530 39.46 36 47.99 121 32.17 8.80 74 .20 .3 .6 SJB 2.6 96 OCT 8 532 23.94 36 48.01 121 32.01 8.23 71 .19 .2 .5 SJB 2.4 96 OCT 8 532 32.97 38 24.41 119 17.77 6.10 7 .04 .6 1.8 WAK 1.7 96 OCT 8 559 27.19 38 49.20 122 48.54 3.98 7 .03 .5 .9 GEY 1.0 96 OCT 8 641 14.00 38 49.95 122 52.48 1.94 14 .07 .3 .8 GEY 1.5 96 OCT 8 702 33.00 36 47.89 121 32.05 8.03 78 4 .20 .2 .5 SJB 2.7 96 OCT 8 725 40.26 37 34.11 118 49.95 3.87 26 .07 .3 .5 MOR 2.0 96 OCT 8 838 54.94 37 38.73 121 40.92 5.82 10 .06 .3 .4 HAM 1.1 96 OCT 8 904 25.21 38 48.52 122 48.83 4.56 16 .04 .2 .5 GEY 1.6 96 OCT 8 909 45.59 37 34.30 118 51.14 6.85 19 .06 .3 .6 MOR 1.3 96 OCT 8 923 26.38 37 3.80 120 50.73 0.63 40 1 .35 .8 4.1 JQN## 1.9 --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 96 OCT 8 1045 21.56 36 8.43 121 16.89 12.71 20 .05 .4 1.2 SAL 1.8 96 OCT 8 1202 14.11 37 37.77 118 53.84 8.76 30 .09 .3 .5 SMO 2.2 96 OCT 8 1246 52.48 37 38.20 118 53.39 8.13 20 .09 .4 .7 SMO 1.2 96 OCT 8 1247 8.59 35 59.14 120 59.41 8.20 48 .07 .2 .7 ROB 2.0 96 OCT 8 1401 47.44 37 56.52 118 8.79 2.83 38 .12 1.0 3.5 NEV 4.0 96 OCT 8 1543 31.75 39 35.91 120 7.02 0.02 24 .28 1.2 2.1 WAK # 2.8 96 OCT 8 1546 7.22 35 56.08 120 55.48 7.02 12 .06 .4 .9 ROB 1.4 96 OCT 8 1623 40.66 37 38.17 118 53.03 8.79 8 .07 .6 1.4 SMO 1.0 96 OCT 8 1710 28.21 37 55.35 118 10.49 4.95 21 .09 1.410.4 NEV - 2.0 96 OCT 8 1736 58.08 37 56.11 118 8.42 5.04 21 .08 1.6 9.8 NEV - 2.0 96 OCT 8 1842 33.08 37 32.28 118 50.01 8.74 11 .08 .5 .9 MOR 1.1 96 OCT 8 1856 40.80 37 37.74 118 53.84 8.98 22 1 .08 .3 .6 SMO 1.4 96 OCT 8 2001 21.11 39 35.55 120 9.09 0.02 48 1 .32 .9 1.1 WAK # 2.8 96 OCT 8 2002 25.09 40 6.34 123 44.22 20.08 8 .15 .9 1.2 MEN 1.7 96 OCT 8 2019 21.93 38 46.88 122 52.88 3.97 7 .09 .7 1.1 GEY 1.0 96 OCT 8 2128 22.00 38 45.44 122 42.49 1.68 13 .06 .3 .4 GEY# 1.5 96 OCT 8 2131 27.43 38 45.42 122 42.35 1.60 11 .07 .3 .5 GEY 1.7 96 OCT 8 2246 2.95 39 34.71 120 9.63 2.79 32 .16 .6 1.3 WAK 2.6 96 OCT 9 115 55.50 36 47.88 121 31.71 7.25 57 2 .18 .3 .6 SJB 2.2 96 OCT 9 118 16.89 36 28.03 121 2.20 2.11 10 .04 .6 .9 BIT 1.6 96 OCT 9 157 56.71 39 22.91 123 16.35 0.02 22 4 .25 .5 1.8 MAA # 1.8 96 OCT 9 403 34.85 36 46.08 121 16.81 7.78 12 .05 .4 .7 PAI 1.0 96 OCT 9 421 59.12 36 16.61 120 27.24 9.57 38 2 .14 .2 .4 COA 2.0 96 OCT 9 516 28.77 37 8.89 121 32.51 8.30 28 .05 .2 .5 CYN 1.2 96 OCT 9 552 45.94 36 59.03 121 38.69 0.54 13 .06 .3 1.7 SAR 1.0 96 OCT 9 701 5.16 38 23.78 119 17.69 4.88 13 .05 1.0 1.8 WAK 2.0 96 OCT 9 751 11.11 37 36.32 118 51.68 6.04 11 .04 .4 .6 SHE 1.1 96 OCT 9 819 48.57 38 51.02 122 47.56 0.04 8 .09 .4 1.9 GEY # 1.2 96 OCT 9 824 45.71 37 36.46 118 51.51 5.70 9 .04 .5 .6 SMO 1.2 96 OCT 9 829 39.71 37 36.74 118 51.28 6.38 22 .06 .3 .4 SMO 1.4 96 OCT 9 852 13.82 40 14.71 124 11.43 11.68 11 2 .10 .5 .8 MEN 1.6 96 OCT 9 911 51.90 40 14.65 124 11.38 11.74 10 1 .09 .4 .7 MEN 1.5 96 OCT 9 1344 39.04 40 23.55 125 5.81 2.04 19 1 .26 1.8 2.1 MEN 2.5 96 OCT 9 1459 49.96 36 22.61 121 1.13 1.16 16 .11 .4 .9 BIT 2.1 96 OCT 9 1515 30.97 38 49.30 122 48.02 3.70 9 .03 .3 .7 GEY 1.6 96 OCT 9 1536 53.88 37 29.51 121 50.61 8.48 28 .10 .3 .6 MIS 1.7 96 OCT 9 2031 12.73 37 34.01 118 49.73 2.57 7 .05 .4 .8 MOR 1.3 96 OCT 9 2244 37.28 38 50.30 122 52.95 3.62 8 .04 .6 1.9 GEY 1.2 96 OCT 9 2355 8.70 39 22.53 123 15.85 5.55 13 .15 .6 3.6 MAA 2.0 96 OCT 10 157 26.07 36 47.28 121 1.11 3.68 28 .13 .3 2.1 ORT 1.9 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 30 001239.7 23.694N 143.847E 32D 5.1 0.8 83 VOLCANO ISLANDS REGION 003203.2 0.146S 125.180E 33N 5.3 1.1 37 SOUTHERN MOLUCCA SEA 011918.3? 23.31 N 144.50 E 33N 4.9 0.5 9 VOLCANO ISLANDS REGION 015338.2* 59.101S 25.001W 33N 4.4 1.3 9 SOUTH SANDWICH ISLANDS REGION 020724.2* 59.077S 24.822W 33N 4.6 1.1 14 SOUTH SANDWICH ISLANDS REGION 032004.3 10.984N 124.866E 33N 5.2 4.6 0.8 32 LEYTE, PHILIPPINE ISLANDS 034426.6? 33.48 S 68.99 W 10G 0.5 11 MENDOZA PROV. ARGENTINA. MD 4.1 051730.9* 31.421S 179.839E 400G 4.5 1.2 43 KERMADEC ISLANDS REGION 054614.8* 37.154N 16.511E 10G 0.5 7 IONIAN SEA. ML 3.1 (ROM). 062539.5* 25.831N 143.478E 33N 4.6 0.8 8 VOLCANO ISLANDS REGION 070908.0% 34.073S 70.098W 10G 0.3 11 CHILE-ARGENTINA BORDER. MD 3.3 073957.2 36.027N 70.893E 108D 4.5 0.8 24 HINDU KUSH REGION, AFGHANISTAN 081717.0* 33.256N 141.409E 33N 4.9 0.4 9 OFF EAST COAST OF HONSHU, JAPAN 083654.8 5.869S 148.159E 33N 5.4 1.2 33 NEW BRITAIN REGION, P.N.G. 084642.6 23.219N 143.642E 33N 4.7 0.7 35 VOLCANO ISLANDS REGION 092213.0 38.016N 14.041E 10G 1.4 19 SICILY. ML 3.3 (ROM). 101328.1 6.852S 126.842E 400G 4.8 0.9 32 BANDA SEA 103303.3* 9.900N 126.336E 33N 4.4 1.3 20 MINDANAO, PHILIPPINE ISLANDS 112751.5 45.509N 151.721E 33N 5.5 5.1 1.1 161 KURIL ISLANDS 112857.3? 23.07 S 169.79 E 33N 4.6 1.4 20 LOYALTY ISLANDS REGION 114547.1 45.454N 151.702E 33N 5.0 1.1 48 KURIL ISLANDS 114829.3? 11.01 N 61.87 W 70G 1.3 6 WINDWARD ISLANDS. MD 3.1 (TRN). 150140.9? 32.98 S 72.14 W 10G 0.6 8 OFF COAST-CENTRAL CHILE. MD 3.3 155339.8* 8.117S 120.666E 100G 4.2 1.5 16 FLORES REGION, INDONESIA 163720.6* 45.483N 151.745E 33N 4.7 1.1 26 KURIL ISLANDS 203402.5* 9.762N 126.369E 33N 4.5 1.2 18 MINDANAO, PHILIPPINE ISLANDS 205043.6* 23.222N 143.684E 33N 4.6 1.0 11 VOLCANO ISLANDS REGION 222543.7* 9.266N 125.279E 33N 4.5 1.0 15 MINDANAO, PHILIPPINE ISLANDS OCT 01 002539.4 45.424N 151.691E 33N 5.3 4.9 1.1 132 KURIL ISLANDS 002637.8* 35.943N 22.100E 10G 0.8 14 CENTRAL MEDITERRANEAN. ML 4.2 024015.8? 45.77 N 151.72 E 33N 4.8 1.1 35 KURIL ISLANDS 030310.3* 8.298S 117.693E 33N 4.3 1.3 12 SUMBAWA REGION, INDONESIA 075427.2* 22.839N 120.909E 33N 4.6 1.4 20 TAIWAN 090506.3* 23.227N 143.865E 33N 4.4 0.9 17 VOLCANO ISLANDS REGION 093950.8 13.705S 170.629E 600G 4.5 0.7 38 VANUATU ISLANDS REGION 110125.2 44.085N 148.317E 33N 5.5 4.9 0.8 177 KURIL ISLANDS 114410.0 40.542N 145.143E 33N 4.7 1.0 28 OFF EAST COAST OF HONSHU, JAPAN 120928.0& 59.450N 137.580W 0 29 SOUTHEASTERN ALASKA. ML 3.6 121432.0* 11.356N 126.100E 33N 5.0 1.3 32 PHILIPPINE ISLANDS REGION 143350.9? 20.12 S 178.15 W 600G 4.6 0.6 11 FIJI ISLANDS REGION 145311.8 19.688S 178.302W 594D 4.9 0.9 62 FIJI ISLANDS REGION 174410.3* 17.096S 174.654W 100G 4.9 1.2 64 TONGA ISLANDS 175123.6* 9.922S 124.341E 33N 4.5 1.4 14 TIMOR REGION, INDONESIA 183826.7* 6.072S 128.772E 300G 4.8 1.5 17 BANDA SEA 202044.0? 25.92 N 110.89 W 10G 4.2 0.5 14 GULF OF CALIFORNIA 204556.4* 44.369N 149.508E 33N 4.6 1.2 37 KURIL ISLANDS 215738.7* 1.857S 76.958W 150G 4.6 1.1 9 ECUADOR OCT 02 010053.9* 31.878S 71.793W 33N 0.4 11 NEAR COAST-CENTRAL CHILE. MD 4.4 011144.0? 23.17 N 143.97 E 33N 4.1 0.8 7 VOLCANO ISLANDS REGION 023504.1% 33.509S 71.172W 50G 0.4 11 NEAR COAST-CENTRAL CHILE. MD 3.4 035422.4? 18.75 S 169.51 E 242D 4.6 1.1 16 VANUATU ISLANDS 041949.7 41.175N 142.053E 74 4.6 1.0 33 HOKKAIDO, JAPAN REGION 050320.6* 44.419N 149.509E 33N 4.9 1.1 27 KURIL ISLANDS 080040.8 13.785N 144.792E 122D 5.2 1.0 108 MARIANA ISLANDS. Felt (V) at Agana, Asan, Dededo, Piti, Tamuning and Tumon; (IV) at Santa Rita and Yigo, Guam. Also felt slightly on Saipan. 081159.6? 11.28 N 127.13 E 33N 4.6 1.0 16 PHILIPPINE ISLANDS REGION 081742.3 9.321N 126.591E 33N 4.8 0.9 29 MINDANAO, PHILIPPINE ISLANDS 082402.3* 9.778N 126.333E 33N 4.6 0.9 26 MINDANAO, PHILIPPINE ISLANDS 083450.6* 9.261N 126.622E 33N 4.5 1.0 21 MINDANAO, PHILIPPINE ISLANDS 101300.1? 11.79 N 125.71 E 33N 4.8 0.9 18 SAMAR, PHILIPPINE ISLANDS 101845.2* 20.735S 178.674W 600G 4.4 0.6 18 FIJI ISLANDS REGION 102148.8* 11.682N 125.479E 33N 4.8 1.0 28 SAMAR, PHILIPPINE ISLANDS 105148.2* 11.741N 125.586E 33N 4.5 0.8 18 SAMAR, PHILIPPINE ISLANDS 111530.3* 11.588N 125.513E 33N 4.4 1.2 15 SAMAR, PHILIPPINE ISLANDS 113332.3* 19.253S 176.805W 300G 4.6 0.8 21 FIJI ISLANDS REGION 125410.3* 9.317N 126.771E 33N 4.3 0.9 16 MINDANAO, PHILIPPINE ISLANDS 130708.9 22.637S 66.233W 236D 4.6 0.9 33 JUJUY PROV., ARGENTINA 131723.3* 64.586N 17.692W 10G 4.6 1.4 22 ICELAND 144211.1* 9.142N 126.368E 33N 4.3 1.1 13 MINDANAO, PHILIPPINE ISLANDS 154232.5* 9.807S 130.831E 33N 4.6 1.3 10 TIMOR SEA 155025.2 11.716N 125.583E 38? 5.1 0.9 37 SAMAR, PHILIPPINE ISLANDS 160020.3 53.424N 160.377E 33N 5.5 4.7 0.9 184 NEAR EAST COAST OF KAMCHATKA 172716.4 28.414N 139.613E 463D 4.9 1.1 129 BONIN ISLANDS REGION 175649.4* 21.636N 121.448E 10G 4.1 0.5 12 TAIWAN REGION 194748.0* 9.779S 113.713E 33N 4.6 1.0 21 SOUTH OF JAWA, INDONESIA 194948.8? 36.95 N 6.97 W 33N 1.1 11 STRAIT OF GIBRALTAR. mbLg 3.0 211210.5? 37.89 N 81.00 W 10G 1.3 7 WEST VIRGINIA 213459.1 34.492N 141.112E 38 4.8 0.7 21 OFF EAST COAST OF HONSHU, JAPAN 215258.5 19.249S 179.410W 686D 5.2 1.0 132 FIJI ISLANDS REGION 220112.9 19.207S 179.381W 671D 4.9 1.1 85 FIJI ISLANDS REGION 223354.7* 11.881N 125.680E 30D 4.7 1.1 23 SAMAR, PHILIPPINE ISLANDS 224521.3 5.352S 154.334E 380D 5.1 0.8 61 SOLOMON ISLANDS OCT 03 060620.5 43.098N 0.281W 10G 1.4 17 PYRENEES. MD 3.6 (MDD). 072554.2? 44.26 N 128.74 W 10G 3.2 0.6 9 OFF COAST OF OREGON 092924.6 47.473N 11.860E 6* 0.3 7 AUSTRIA. ML 3.2. Felt at Brixlegg. 100037.6 44.198N 128.850W 10G 4.4 1.2 41 OFF COAST OF OREGON 100930.5 44.252N 128.943W 10G 4.9 4.7 1.2 75 OFF COAST OF OREGON 130820.9 64.541N 17.704W 10G 4.5 0.9 22 ICELAND 143249.9* 43.625N 147.058E 33N 5.0 0.8 16 KURIL ISLANDS 173231.7* 34.282N 25.371E 10G 4.4 0.9 31 CRETE 182135.4* 27.942N 128.247E 52? 4.7 1.6 19 RYUKYU ISLANDS 224100.1 46.259N 15.176E 10G 1.1 37 NORTHWESTERN BALKANS. ML 3.4 OCT 04 003055.3% 32.637S 70.989W 70G 0.9 11 CHILE-ARGENTINA BORDER. MD 3.2 053833.7* 18.619N 111.149W 10G 4.4 3.7 0.8 23 REVILLA GIGEDO ISLANDS REGION 080313.8* 1.057N 120.790E 109? 4.9 1.4 12 MINAHASSA PENINSULA, SULAWESI 162025.2? 4.84 S 150.85 E 33N 4.9 0.7 8 NEW BRITAIN REGION, P.N.G. 191319.0* 41.525S 89.245W 10G 5.2 0.2 6 SOUTHERN PACIFIC OCEAN OCT 05 000929.0? 28.92 S 68.73 W 120D 4.3 0.7 11 LA RIOJA PROV., ARGENTINA 073758.8 16.765N 86.053W 10G 5.3 4.6 0.9 65 CARIBBEAN SEA. Mw 5.5 (HRV). 111841.9? 43.56 S 82.21 W 10G 5.2 4.7 0.8 14 WEST CHILE RISE OCT 06 053349.3 34.275N 118.462W 10G 0.9 47 SOUTHERN CALIFORNIA. ML 3.2 074500.0? 43.54 S 39.02 E 10G 5.4 5.0 1.1 8 PRINCE EDWARD ISLANDS REGION 100242.9* 9.854S 117.942E 81? 5.1 1.5 7 SUMBAWA REGION, INDONESIA 152512.5* 5.753S 80.806W 33N 4.6 0.6 13 NEAR COAST-NORTHERN PERU 153230.8 13.183N 45.023W 10G 5.3 5.2 0.8 43 NORTHERN MID-ATLANTIC RIDGE 201309.2 49.029N 128.039W 10G 6.0 6.3 0.9 102 VANCOUVER ISLAND REGION. Mw 6.2 204319.1* 49.106N 127.837W 10G 4.2 1.1 19 VANCOUVER ISLAND REGION OCT 07 012159.0 33.160N 115.620W 10G 0.9 25 SOUTHERN CALIFORNIA. ML 3.1 020420.8* 48.918N 127.442W 10G 4.3 0.8 21 VANCOUVER ISLAND REGION 084552.2* 28.698S 62.863W 613? 4.5 0.7 29 SANTIAGO DEL ESTERO PROV., ARG. 092357.1* 21.827S 179.990W 607D 4.7 0.5 27 FIJI ISLANDS REGION 183606.2 49.035N 128.036W 10G 4.6 1.1 37 VANCOUVER ISLAND REGION OCT 08 013652.8* 45.868S 95.930E 10G 5.4 5.9 1.0 8 SOUTHEAST INDIAN RIDGE. Mw 6.1 075257.6 52.886N 152.527E 620D 5.1 0.7 105 NORTHWEST OF KURIL ISLANDS 140149.4 37.960N 118.106W 10G 2.1 77 CALIFORNIA-NEVADA BORDER. ML 4.2 OCT 09 131052 Q 34.5 N 32.1 E 33N 6.8 1.0 135 CYPRUS REGION 141941 Q 35.1 N 32.0 E 33N 5.8 1.0 49 CYPRUS REGION OCT 10 011022 Q 34.5 N 32.2 E 33N 5.6 0.9 104 CYPRUS REGION 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.