Weekly Seismicity Report For July 30, 2018 to August 5, 2018

During the week of July 30, 2018, the Alaska Earthquake Center reported 744 earthquakes within the state. The largest earthquake was magnitude 4.5 that occurred on August 5 at 10:37:18.238 UTC (August 5, 02:37:18.238 AKDT) 27 miles WSW of Amchitka. One event was felt.

Notable Events in Descending Order of Magnitude


August 5 at 10:37:18.238 UTC (August 5, 02:37:18.238 AKDT), Ml 4.5, 51.39N 178.42W, depth=41.4 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
27 miles ( 43 km) WSW of Amchitka
125 miles (202 km) ESE of Buldir Is
204 miles (329 km) ESE of Shemya
214 miles (344 km) W of Adak

August 2 at 03:49:42.892 UTC (August 1, 19:49:42.892 AKDT), Ml 4.5, 51.17N 178.08W, depth=4.8 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
47 miles ( 76 km) WSW of Amchitka
123 miles (198 km) SE of Buldir Is
199 miles (321 km) ESE of Shemya
232 miles (373 km) W of Adak

August 5 at 06:11:53.659 UTC (August 4, 22:11:53.659 AKDT), Ml 4.4, 51.10N 179.20W, depth=22.9 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
31 miles ( 50 km) SSE of Amchitka
165 miles (265 km) ESE of Buldir Is
186 miles (299 km) WSW of Adak
244 miles (392 km) ESE of Shemya

July 31 at 09:08:57.296 UTC (July 31, 01:08:57.296 AKDT), Ml 4.0, 52.45N -166.74W, depth=25.3 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
95 miles (153 km) ESE of Nikolski
99 miles (159 km) S of Unalaska
100 miles (161 km) S of Dutch Harbor
123 miles (199 km) SSW of Akutan

August 1 at 16:17:18.860 UTC (August 1, 08:17:18.860 AKDT), Ml 3.9, 56.51N -148.61W, depth=6.6 km:
A minor earthquake was located in GULF OF ALASKA.
This earthquake was:
167 miles (269 km) ESE of Kodiak
175 miles (282 km) ESE of Ouzinkie
184 miles (295 km) ESE of Old Harbor
185 miles (298 km) ESE of Port Lions

July 31 at 05:55:26.736 UTC (July 30, 21:55:26.736 AKDT), Ml 3.8, 51.32N -173.91W, depth=15.9 km:
A minor earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
62 miles ( 99 km) SSE of Atka
108 miles (174 km) SW of Amukta Pass
124 miles (200 km) ESE of Adak
241 miles (388 km) WSW of Nikolski

August 5 at 00:43:50.850 UTC (August 4, 16:43:50.850 AKDT), Ml 3.8, 51.06N 179.13W, depth=20.1 km:
A minor earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
33 miles ( 53 km) S of Amchitka
163 miles (263 km) ESE of Buldir Is
190 miles (306 km) WSW of Adak
242 miles (389 km) ESE of Shemya

July 31 at 05:44:19.103 UTC (July 30, 21:44:19.103 AKDT), Ml 3.7, 51.45N 176.83W, depth=29.3 km:
A minor earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
73 miles (117 km) SSE of Buldir Is
94 miles (151 km) W of Amchitka
144 miles (232 km) SE of Shemya
183 miles (295 km) ESE of Attu

August 5 at 00:15:52.922 UTC (August 4, 16:15:52.922 AKDT), Ml 3.7, 51.07N 179.13W, depth=19.7 km:
A minor earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
32 miles ( 52 km) S of Amchitka
163 miles (262 km) ESE of Buldir Is
190 miles (305 km) WSW of Adak
242 miles (389 km) ESE of Shemya

August 5 at 02:07:09.472 UTC (August 4, 18:07:09.472 AKDT), Ml 3.6, 53.28N -164.18W, depth=9.9 km:
A minor earthquake was located in UNIMAK ISLAND REGION, ALASKA.
This earthquake was:
88 miles (142 km) SE of Akutan
105 miles (169 km) ESE of Dutch Harbor
105 miles (169 km) ESE of Unalaska
113 miles (182 km) SSW of False Pass

August 2 at 05:29:20.884 UTC (August 1, 21:29:20.884 AKDT), Ml 3.5, 56.44N -149.19W, depth=11.9 km:
A minor earthquake was located in GULF OF ALASKA.
This earthquake was:
152 miles (245 km) SE of Kodiak
161 miles (258 km) SE of Ouzinkie
164 miles (264 km) ESE of Old Harbor
170 miles (273 km) SE of Port Lions

August 3 at 00:18:04 UTC (August 2, 4:18 PM AKDT), Ml 3.4, 62.2N -149.5W, depth=53 km:
A minor earthquake was located in the central region of Alaska. It was felt in Talkeetna, Mat-Su Borough, and Chugiak.
This earthquake was:
19 miles (31 km) ESE of Talkeetna
32 miles (51 km) NNW of Hatcher Pass
36 miles (58 km) NNE of Willow
41 miles (66 km) NNW of Sutton

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.