AEIC compiles monthly seismicity reports for Alaska as soon as the data processing for the month is completed; normally, within 1 week of the month's end.
The monthly seismicity report includes:
ALASKA EARTHQUAKE INFORMATION CENTER MONTHLY SEISMICITY REPORT OCTOBER 2009 During October 2009, the Alaska Earthquake Information Center located 2546 earthquakes within the state. Of these, four were larger than or equal to magnitude 5.0 and nineteen were larger than or equal to magnitude 4.0. Six events were felt. The largest earthquake located in Alaska this month was a strong earthquake of magnitude Mw6.5 that occurred on Monday, October 12 at 09:37 p.m. AKDT, 85 miles ESE of Nikolski. The following is a list of significant earthquakes during the time period: October 01 to October 31, 2009: October 13 at 05:37:21.349 UTC (October 12, 21:37:21.349 AKDT), Mw 6.5, 52.59N -166.93W, depth=13.2 km: A moderate earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. It was felt in Unalaska and Akutan. No reports of damage were received. This earthquake was: 85 miles (136 km) ESE of Nikolski 90 miles (145 km) S of Unalaska 91 miles (147 km) S of Dutch Harbor October 13 at 20:21:52.837 UTC (October 13, 12:21:52.837 AKDT), Mw 6.4, 52.48N -167.10W, depth=13.2 km: A moderate earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 81 miles (130 km) ESE of Nikolski 99 miles (159 km) SSW of Unalaska 101 miles (162 km) SSW of Dutch Harbor October 7 at 05:38:36.935 UTC (October 6, 21:38:36.935 AKDT), Mw 5.6, 51.96N 177.91W, depth=141.0 km: A moderate earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS. It was felt in Shemya. No reports of damage were received. This earthquake was: 56 miles ( 89 km) WNW of Amchitka 88 miles (142 km) ESE of Buldir Is 168 miles (270 km) ESE of Shemya October 15 at 00:13:31.566 UTC (October 14, 16:13:31.566 AKDT), Ml 5.0, 52.70N -166.73W, depth=12.9 km: A moderate earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 81 miles (131 km) S of Unalaska 83 miles (133 km) S of Dutch Harbor 91 miles (146 km) E of Nikolski October 2 at 13:56:32.620 UTC (October 2, 05:56:32.620 AKDT), Ml 4.9, 51.22N -176.84W, depth=5.4 km: A moderate earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. This earthquake was: 46 miles ( 74 km) S of Adak 132 miles (212 km) WSW of Atka 181 miles (291 km) E of Amchitka October 17 at 07:26:34.585 UTC (October 16, 23:26:34.585 AKDT), Ml 4.8, 52.30N 174.05W, depth=47.0 km: A light earthquake was located in NEAR ISLANDS, ALEUTIAN ISLANDS. It was felt in Shemya. No reports of damage were received. This earthquake was: 29 miles ( 46 km) S of Shemya 56 miles ( 90 km) SE of Attu 79 miles (128 km) W of Buldir Is October 23 at 06:21:58.358 UTC (October 22, 22:21:58.358 AKDT), Ml 4.8, 50.99N -179.13W, depth=6.6 km: A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. This earthquake was: 89 miles (143 km) ESE of Amchitka 123 miles (198 km) WSW of Adak 227 miles (366 km) WSW of Atka October 13 at 07:41:05.488 UTC (October 12, 23:41:05.488 AKDT), Ml 4.6, 52.35N -166.84W, depth=11.1 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 94 miles (152 km) ESE of Nikolski 106 miles (170 km) S of Unalaska 107 miles (172 km) S of Dutch Harbor October 13 at 07:46:20.333 UTC (October 12, 23:46:20.333 AKDT), Ml 4.5, 52.39N -166.95W, depth=18.6 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 89 miles (143 km) ESE of Nikolski 104 miles (167 km) S of Unalaska 105 miles (169 km) S of Dutch Harbor October 13 at 08:25:55.968 UTC (October 13, 00:25:55.968 AKDT), Ml 4.3, 52.59N -166.96W, depth=9.8 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 83 miles (134 km) ESE of Nikolski 90 miles (145 km) SSW of Unalaska 91 miles (147 km) SSW of Dutch Harbor October 15 at 22:33:37.691 UTC (October 15, 14:33:37.691 AKDT), Ml 4.3, 51.53N -175.77W, depth=24.6 km: A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. This earthquake was: 45 miles ( 72 km) ESE of Adak 81 miles (131 km) WSW of Atka 170 miles (274 km) WSW of Amukta Pass October 20 at 17:01:20.451 UTC (October 20, 09:01:20.451 AKDT), Ml 4.2, 51.36N -173.66W, depth=17.7 km: A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. This earthquake was: 62 miles (100 km) SSE of Atka 98 miles (158 km) SW of Amukta Pass 133 miles (215 km) ESE of Adak October 15 at 03:35:25.234 UTC (October 14, 19:35:25.234 AKDT), Ml 4.2, 52.50N -166.53W, depth=25.5 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 95 miles (153 km) S of Unalaska 96 miles (155 km) S of Dutch Harbor 102 miles (165 km) ESE of Nikolski October 13 at 07:40:23.137 UTC (October 12, 23:40:23.137 AKDT), Ml 4.2, 52.44N -166.98W, depth=29.9 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 86 miles (139 km) ESE of Nikolski 101 miles (162 km) S of Unalaska 102 miles (164 km) S of Dutch Harbor October 27 at 00:33:29.111 UTC (October 26, 16:33:29.111 AKDT), Ml 4.2, 53.63N -164.36W, depth=15.5 km: A light earthquake was located in UNIMAK ISLAND REGION, ALASKA. This earthquake was: 67 miles (108 km) ESE of Akutan 90 miles (145 km) E of Dutch Harbor 90 miles (145 km) E of Unalaska October 13 at 23:49:17.964 UTC (October 13, 15:49:17.964 AKDT), Ml 4.1, 52.32N -166.73W, depth=42.1 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 99 miles (160 km) ESE of Nikolski 108 miles (173 km) S of Unalaska 109 miles (175 km) S of Dutch Harbor October 29 at 09:29:29.258 UTC (October 29, 01:29:29.258 AKDT), Ml 4.1, 51.94N -173.28W, depth=62.9 km: A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. This earthquake was: 43 miles ( 69 km) ESE of Atka 61 miles ( 99 km) WSW of Amukta Pass 144 miles (231 km) E of Adak October 31 at 03:04:16.510 UTC (October 30, 19:04:16.510 AKDT), Ml 4.1, 51.49N -176.04W, depth=6.8 km: A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. This earthquake was: 38 miles ( 60 km) SE of Adak 92 miles (149 km) WSW of Atka 182 miles (293 km) WSW of Amukta Pass October 17 at 05:23:06.803 UTC (October 16, 21:23:06.803 AKDT), Ml 4.1, 51.68N 176.57W, depth=5.3 km: A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 53 miles ( 86 km) SSE of Buldir Is 105 miles (169 km) W of Amchitka 126 miles (202 km) ESE of Shemya October 27 at 01:16:36.109 UTC (October 26, 17:16:36.109 AKDT), Ml 4.1, 51.72N 176.84W, depth=29.5 km: A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 58 miles ( 94 km) SE of Buldir Is 94 miles (151 km) W of Amchitka 134 miles (216 km) ESE of Shemya October 4 at 11:22:44.605 UTC (October 4, 03:22:44.605 AKDT), Ml 4.1, 61.91N -151.56W, depth=101.5 km: A light earthquake was located in SOUTHERN ALASKA.It was felt in Anchorage and Palmer. No reports of damage were received. This earthquake was: 13 miles ( 21 km) WSW of Skwentna 51 miles ( 82 km) WNW of Willow 55 miles ( 88 km) WSW of Talkeetna October 16 at 05:00:45.663 UTC (October 15, 21:00:45.663 AKDT), Ml 4.1, 52.58N -166.92W, depth=8.1 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 85 miles (137 km) ESE of Nikolski 90 miles (145 km) S of Unalaska 92 miles (148 km) S of Dutch Harbor October 13 at 09:54:29.776 UTC (October 13, 01:54:29.776 AKDT), Ml 4.0, 52.59N -166.96W, depth=27.8 km: A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS. This earthquake was: 83 miles (134 km) ESE of Nikolski 90 miles (145 km) SSW of Unalaska 91 miles (147 km) SSW of Dutch Harbor This report was compiled by N.Kozyreva. The data in this report are preliminary and subject to revision. Most of the earthquake parameters have been determined by AEIC, with supplemental data provided by the U.S.G.S. National Earthquake Information Center, Box 25046, Denver Federal Center MS 967, Denver, CO 80225. The data are released on the condition that none of the cooperating agencies may be held liable for any damages resulting from its authorized or unauthorized use. For more information on earthquakes and seismology, contact the AEIC at (907)-474-7320.