Weekly Seismicity Report For September 11, 2017 to September 17, 2017

During the week of September 11, 2017, the Alaska Earthquake Center reported 676 earthquakes within the state. The largest earthquake was magnitude 5.2 that occurred on September 11 at 21:52:06.787 UTC (September 11, 13:52:06.787 AKDT), 85 miles WSW of Adak. Two events were felt.

Notable Events in Descending Order of Magnitude


September 11 at 21:52:06.787 UTC (September 11, 13:52:06.787 AKDT), Ml 5.2, 51.19N -178.30W, depth=27.6 km:
A moderate earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
85 miles (137 km) WSW of Adak
119 miles (191 km) E of Amchitka
189 miles (304 km) WSW of Atka
260 miles (418 km) ESE of Buldir Is

September 16 at 23:38:01.481 UTC (September 16, 15:38:01.481 AKDT), Ml 5.0, 59.85N -136.79W, depth=5.4 km:
A moderate earthquake was located in SOUTHEASTERN ALASKA.
This event was felt throughout Southeast Alaska and in Whitehorse, Canada.
This earthquake was:
44 miles ( 72 km) NW of Klukwan
58 miles ( 94 km) WNW of Skagway
63 miles (102 km) NW of Haines
67 miles (108 km) SSE of Haines Junction

September 12 at 06:43:43.522 UTC (September 11, 22:43:43.522 AKDT), Ml 4.5, 55.20N -157.06W, depth=9.7 km:
A light earthquake was located in ALASKA PENINSULA.
This earthquake was:
92 miles (147 km) SE of Chignik
95 miles (153 km) ESE of Perryville
98 miles (157 km) SE of Chignik Lagoon
134 miles (216 km) SSE of Port Heiden

September 13 at 07:22:17.138 UTC (September 12, 23:22:17.138 AKDT), Ml 4.2, 62.90N -149.92W, depth=79.7 km:
A light earthquake was located in CENTRAL ALASKA.
This event was felt throughout South-central Alaska.
This earthquake was:
40 miles ( 65 km) N of Talkeetna
45 miles ( 73 km) SW of Cantwell
54 miles ( 86 km) SE of Kantishna
55 miles ( 88 km) SW of Denali Park

September 16 at 01:34:46.235 UTC (September 15, 17:34:46.235 AKDT), Ml 4.0, 51.69N -170.32W, depth=41.5 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
85 miles (136 km) ESE of Amukta Pass
106 miles (170 km) SW of Nikolski
169 miles (272 km) E of Atka
218 miles (351 km) SW of Unalaska

September 11 at 20:40:49.267 UTC (September 11, 12:40:49.267 AKDT), Ml 4.0, 51.98N -173.35W, depth=44.8 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
39 miles ( 63 km) ESE of Atka
63 miles (101 km) WSW of Amukta Pass
141 miles (227 km) E of Adak
200 miles (322 km) WSW of Nikolski

September 15 at 11:45:07.859 UTC (September 15, 03:45:07.859 AKDT), Ml 3.8, 54.41N -161.51W, depth=10.4 km:
A minor earthquake was located in ALASKA PENINSULA.
This earthquake was:
55 miles ( 88 km) SE of King Cove
72 miles (116 km) SE of Cold Bay
76 miles (122 km) SSW of Sand Point
82 miles (131 km) ESE of False Pass

September 15 at 13:04:36.865 UTC (September 15, 05:04:36.865 AKDT), Ml 3.8, 51.73N 177.10W, depth=69.3 km:
A minor earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
66 miles (106 km) SE of Buldir Is
83 miles (133 km) W of Amchitka
143 miles (231 km) ESE of Shemya
183 miles (295 km) ESE of Attu

September 12 at 15:40:31.056 UTC (September 12, 07:40:31.056 AKDT), Ml 3.7, 55.15N -157.09W, depth=22.0 km:
A minor earthquake was located in ALASKA PENINSULA.
This earthquake was:
94 miles (151 km) SSE of Chignik
96 miles (154 km) ESE of Perryville
100 miles (161 km) SE of Chignik Lagoon
135 miles (217 km) E of Sand Point

September 13 at 04:04:34.933 UTC (September 12, 20:04:34.933 AKDT), Ml 3.5, 51.63N -178.49W, depth=6.8 km:
A minor earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
81 miles (130 km) WSW of Adak
108 miles (173 km) E of Amchitka
187 miles (301 km) W of Atka
242 miles (390 km) E of Buldir Is

This report was compiled by N.Kozyreva.

The data in this report are preliminary and subject to revision. The earthquake parameters have been determined by AEC, with supplemental data provided by the USGS National Earthquake Information Center. 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 AEC at (907)-474-7320.