Monthly Seismicity Report For August 1, 2017 to August 31, 2017

During August 2017, the Alaska Earthquake Center located 3295 earthquakes within the state. Of these, 25 were larger than or equal to magnitude 4.0. 14 events were felt. The largest earthquake located in Alaska this month was a moderate earthquake of magnitude 5.5 that occurred on August 31 at 17:46:02.874 UTC (August 31, 09:46 AM AKDT), 49 miles NW of Port Lions 49 miles NW of Port Lions.

Notable Events in Descending Order of Magnitude

August 31 at 17:46:02.874 UTC (August 31, 09:46:02.874 AKDT), Ml 5.5, 58.45N -153.65W, depth=62.5 km:
A moderate earthquake was located in KODIAK ISLAND REGION, ALASKA.
This event was felt in Kodiak and Kenai Peninsula communities as far as Anchorage.
This earthquake was:
49 miles ( 79 km) NW of Port Lions
56 miles ( 90 km) NW of Ouzinkie
64 miles (103 km) N of Larsen Bay

August 9 at 05:40:38.937 UTC (August 8, 21:40:38.937 AKDT), Ml 5.2, 52.39N -169.04W, depth=23.6 km:
A moderate earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
38 miles ( 62 km) S of Nikolski
125 miles (201 km) E of Amukta Pass
146 miles (234 km) SW of Unalaska

August 9 at 05:48:26.127 UTC (August 8, 21:48:26.127 AKDT), Ml 5.1, 52.36N -169.02W, depth=21.9 km:
A moderate earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
40 miles ( 64 km) S of Nikolski
126 miles (202 km) E of Amukta Pass
146 miles (236 km) SW of Unalaska

August 1 at 05:00:25.381 UTC (July 31, 21:00:25.381 AKDT), Ml 5.1, 51.60N -176.15W, depth=41.6 km:
A moderate earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
29 miles ( 47 km) SE of Adak
93 miles (149 km) WSW of Atka
184 miles (296 km) WSW of Amukta Pass

August 11 at 06:18:17.701 UTC (August 10, 22:18:17.701 AKDT), Ml 4.9, 60.07N -152.48W, depth=95.5 km:
A light earthquake was located in SOUTHERN ALASKA.
This event was felt in Kenai Peninsula and the Greater Anchorage area.
This earthquake was:
28 miles ( 45 km) W of Ninilchik
30 miles ( 49 km) NW of Anchor Point
39 miles ( 63 km) WSW of Clam Gulch

August 5 at 02:07:45.764 UTC (August 4, 18:07:45.764 AKDT), Ml 4.9, 51.47N -178.48W, depth=6.9 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
83 miles (134 km) WSW of Adak
108 miles (174 km) E of Amchitka
190 miles (305 km) WSW of Atka

August 8 at 21:46:46.817 UTC (August 8, 13:46:46.817 AKDT), Ml 4.8, 53.07N 172.65W, depth=25.4 km:
A light earthquake was located in NEAR ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
26 miles ( 42 km) WNW of Attu
66 miles (106 km) WNW of Shemya
146 miles (235 km) WNW of Buldir Is

August 12 at 14:41:24.060 UTC (August 12, 06:41:24.060 AKDT), Ml 4.8, 55.40N -151.90W, depth=19.9 km:
A light earthquake was located in SOUTH OF ALASKA.
This earthquake was:
136 miles (218 km) SSE of Old Harbor
138 miles (222 km) SE of Akhiok
166 miles (268 km) S of Kodiak

August 9 at 13:49:28.153 UTC (August 9, 05:49:28.153 AKDT), Ml 4.6, 52.45N -169.02W, depth=24.0 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
34 miles ( 55 km) S of Nikolski
126 miles (202 km) E of Amukta Pass
142 miles (229 km) SW of Unalaska

August 31 at 07:53:21.996 UTC (August 30, 23:53:21.996 AKDT), Ml 4.6, 63.02N -150.54W, depth=104.5 km:
A light earthquake was located in CENTRAL ALASKA.
This event was felt throughout south-central Alaska.
This earthquake was:
37 miles ( 60 km) SSE of Kantishna
50 miles ( 80 km) NNW of Talkeetna
56 miles ( 90 km) WSW of Cantwell

August 18 at 01:16:57.618 UTC (August 17, 17:16:57.618 AKDT), Ml 4.5, 51.08N 178.76W, depth=13.1 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
33 miles ( 53 km) SSW of Amchitka
149 miles (240 km) SE of Buldir Is
205 miles (330 km) WSW of Adak

August 25 at 12:28:19.825 UTC (August 25, 04:28:19.825 AKDT), Ml 4.5, 50.46N -178.50W, depth=56.2 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
126 miles (203 km) SW of Adak
131 miles (211 km) ESE of Amchitka
221 miles (355 km) WSW of Atka

August 27 at 07:51:27.753 UTC (August 26, 23:51:27.753 AKDT), Ml 4.4, 60.42N -151.89W, depth=70.8 km:
A light earthquake was located in KENAI PENINSULA, ALASKA.
This event was felt widely throughout south-central Alaska.
This earthquake was:
22 miles ( 35 km) NW of Clam Gulch
22 miles ( 35 km) WNW of Kasilof
23 miles ( 38 km) WSW of Kenai

August 10 at 03:44:10.093 UTC (August 9, 19:44:10.093 AKDT), Ml 4.4, 54.55N -134.19W, depth=15.0 km:
A light earthquake was located in HAIDA GWAII REGION.
This event was felt in Ketchikan.
This earthquake was:
50 miles ( 81 km) WNW of Dixon Entrance
70 miles (113 km) SW of Hydaburg
76 miles (122 km) SSW of Craig

August 5 at 10:05:36.424 UTC (August 5, 02:05:36.424 AKDT), Ml 4.3, 51.39N 178.78W, depth=43.6 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
13 miles ( 22 km) SW of Amchitka
139 miles (223 km) ESE of Buldir Is
199 miles (319 km) W of Adak

August 10 at 22:28:06.816 UTC (August 10, 14:28:06.816 AKDT), Ml 4.3, 53.48N -163.41W, depth=46.6 km:
A light earthquake was located in UNIMAK ISLAND REGION, ALASKA.
This earthquake was:
94 miles (152 km) S of False Pass
106 miles (171 km) ESE of Akutan
117 miles (189 km) SSW of King Cove

August 21 at 10:43:33.836 UTC (August 21, 02:43:33.836 AKDT), Ml 4.3, 62.07N -149.54W, depth=56.1 km:
A light earthquake was located in CENTRAL ALASKA.
This event was felt throughout Mat-Su and Anchorage area.
This earthquake was:
22 miles ( 36 km) NNW of Hatcher Pass
25 miles ( 40 km) SE of Talkeetna
28 miles ( 45 km) NE of Willow

August 21 at 17:53:38.792 UTC (August 21, 09:53:38.792 AKDT), Ml 4.2, 51.86N 178.26W, depth=135.0 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
39 miles ( 63 km) NW of Amchitka
105 miles (168 km) ESE of Buldir Is
185 miles (297 km) ESE of Shemya

August 15 at 01:42:33.349 UTC (August 14, 17:42:33.349 AKDT), Ml 4.2, 55.32N -151.81W, depth=9.1 km:
A light earthquake was located in SOUTH OF ALASKA.
This earthquake was:
142 miles (229 km) SSE of Old Harbor
144 miles (232 km) SE of Akhiok
172 miles (277 km) S of Kodiak

August 11 at 14:39:12.617 UTC (August 11, 06:39:12.617 AKDT), Ml 4.2, 52.26N -169.09W, depth=19.4 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
47 miles ( 76 km) SSW of Nikolski
123 miles (198 km) E of Amukta Pass
154 miles (247 km) SW of Unalaska

August 13 at 23:24:30.090 UTC (August 13, 15:24:30.090 AKDT), Ml 4.2, 51.75N -176.69W, depth=75.2 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
9 miles ( 14 km) S of Adak
110 miles (177 km) WSW of Atka
185 miles (298 km) E of Amchitka

August 19 at 07:36:39.466 UTC (August 18, 23:36:39.466 AKDT), Ml 4.2, 55.24N -156.75W, depth=58.8 km:
A light earthquake was located in SOUTH OF ALASKA.
This earthquake was:
97 miles (156 km) SE of Chignik
103 miles (165 km) SE of Chignik Lagoon
104 miles (167 km) ESE of Perryville

August 23 at 00:10:54.569 UTC (August 22, 16:10:54.569 AKDT), Ml 4.1, 51.08N -179.92W, depth=13.5 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
56 miles ( 90 km) ESE of Amchitka
151 miles (243 km) WSW of Adak
198 miles (319 km) ESE of Buldir Is

August 18 at 04:44:35.691 UTC (August 17, 20:44:35.691 AKDT), Ml 4.1, 59.00N -136.39W, depth=11.6 km:
A light earthquake was located in SOUTHEASTERN ALASKA.
This event was felt throughout southeastern Alaska.
This earthquake was:
32 miles ( 52 km) SSW of Klukwan
37 miles ( 60 km) WSW of Haines
47 miles ( 76 km) NNW of Gustavus

August 8 at 16:41:09.628 UTC (August 8, 08:41:09.628 AKDT), Ml 4.0, 53.49N 171.63W, depth=5.0 km:
A light earthquake was located in NEAR ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
77 miles (124 km) WNW of Attu
117 miles (188 km) WNW of Shemya
196 miles (315 km) WNW of Buldir Is

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 the Alaska Earthquake Center, with supplemental data provided by the USGS 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 AEC at (907)-474-7320.