Monthly Seismicity Report For August 1, 2018 to August 31, 2018

During August 2018, the Alaska Earthquake Center located 6360 earthquakes within the state. Of these, 67 were larger than or equal to magnitude 4.0. Eight events were felt. The largest earthquake located in Alaska this month was a strong earthquake of magnitude 6.4 that occurred on August 15 at 21:56:53.182 UTC (August 15, 13:56:53.182 AKDT), 76 miles SW of Adak.

Notable Events in Descending Order of Magnitude

August 15 at 21:56:53.182 UTC (August 15, 13:56:53.182 AKDT), Ml 6.4, 51.10N -177.91W, depth=8.8 km:
A strong earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..It was felt in Adak.
This earthquake was:
76 miles (122 km) SW of Adak
137 miles (220 km) ESE of Amchitka
176 miles (283 km) WSW of Atka

August 12 at 14:58:53.503 UTC (August 12, 06:58:53.503 AKDT), Ml 6.3, 69.58N -145.29W, depth=15.8 km:
A strong earthquake was located in NORTHERN ALASKA. It was felt widely across the eastern North Slope Borough.
This earthquake was:
55 miles ( 88 km) SW of Kaktovik
79 miles (128 km) E of Pump Station #2
86 miles (138 km) ESE of Deadhorse

August 12 at 21:15:00.999 UTC (August 12, 13:15:00.999 AKDT), Ml 6.1, 69.52N -144.34W, depth=16.2 km:
A strong earthquake was located in NORTHERN ALASKA. It was felt across the eastern North Star Borough and in Fairbanks region.
This earthquake was:
45 miles ( 72 km) SSW of Kaktovik
101 miles (163 km) NNE of Arctic Village
102 miles (165 km) E of Pump Station #2

August 23 at 03:35:09.747 UTC (August 22, 19:35:09.747 AKDT), Ml 6.0, 51.06N -177.70W, depth=1.4 km:
A strong earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS.. It was felt in Adak.
This earthquake was:
72 miles (116 km) SW of Adak
146 miles (235 km) ESE of Amchitka
170 miles (273 km) WSW of Atka

August 17 at 04:35:27.047 UTC (August 16, 20:35:27.047 AKDT), Ml 5.9, 50.82N -178.07W, depth=15.9 km:
A strong earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
95 miles (153 km) SW of Adak
136 miles (219 km) ESE of Amchitka
191 miles (308 km) WSW of Atka

August 25 at 16:50:00.767 UTC (August 25, 08:50:00.767 AKDT), Ml 5.7, 52.03N -171.02W, depth=7.9 km:
A moderate earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
47 miles ( 75 km) ESE of Amukta Pass
110 miles (177 km) WSW of Nikolski
135 miles (218 km) E of Atka

August 12 at 16:02:08.714 UTC (August 12, 08:02:08.714 AKDT), Ml 5.5, 69.57N -144.96W, depth=18.4 km:
A moderate earthquake was located in NORTHERN ALASKA.
This earthquake was:
50 miles ( 81 km) SW of Kaktovik
87 miles (141 km) E of Pump Station #2
93 miles (150 km) ESE of Deadhorse

August 12 at 21:31:03.882 UTC (August 12, 13:31:03.882 AKDT), Ml 5.1, 69.45N -144.31W, depth=15.5 km:
A moderate earthquake was located in NORTHERN ALASKA.
This earthquake was:
49 miles ( 79 km) SSW of Kaktovik
97 miles (156 km) NNE of Arctic Village
103 miles (166 km) E of Pump Station #2

August 12 at 18:36:43.191 UTC (August 12, 10:36:43.191 AKDT), Ml 5.1, 69.55N -144.73W, depth=17.8 km:
A moderate earthquake was located in NORTHERN ALASKA.
This earthquake was:
48 miles ( 77 km) SW of Kaktovik
93 miles (149 km) E of Pump Station #2
98 miles (158 km) ESE of Deadhorse

August 12 at 15:14:19.893 UTC (August 12, 07:14:19.893 AKDT), Ml 5.0, 69.56N -144.78W, depth=13.4 km:
A moderate earthquake was located in NORTHERN ALASKA.
This earthquake was:
48 miles ( 77 km) SW of Kaktovik
92 miles (148 km) E of Pump Station #2
97 miles (156 km) ESE of Deadhorse

August 13 at 19:36:08.766 UTC (August 13, 11:36:08.766 AKDT), Ml 5.0, 69.55N -144.46W, depth=17.3 km:
A moderate earthquake was located in NORTHERN ALASKA.
This earthquake was:
45 miles ( 72 km) SSW of Kaktovik
99 miles (160 km) E of Pump Station #2
102 miles (164 km) NNE of Arctic Village

August 12 at 15:01:04.135 UTC (August 12, 07:01:04.135 AKDT), Ml 4.9, 69.49N -144.61W, depth=3.7 km:
A moderate earthquake was located in NORTHERN ALASKA.
This earthquake was:
50 miles ( 80 km) SSW of Kaktovik
96 miles (154 km) E of Pump Station #2
97 miles (157 km) NNE of Arctic Village

August 12 at 15:18:37.084 UTC (August 12, 07:18:37.084 AKDT), Ml 4.8, 69.50N -144.74W, depth=10.2 km:
A light earthquake was located in NORTHERN ALASKA.
This earthquake was:
51 miles ( 82 km) SSW of Kaktovik
93 miles (149 km) E of Pump Station #2
97 miles (156 km) NNE of Arctic Village

August 25 at 22:33:52.125 UTC (August 25, 14:33:52.125 AKDT), Ml 4.8, 55.66N -149.19W, depth=11.2 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
190 miles (305 km) ESE of Old Harbor
191 miles (307 km) SE of Kodiak
200 miles (322 km) SE of Ouzinkie

August 28 at 15:18:43.464 UTC (August 28, 07:18:43.464 AKDT), Ml 4.7, 65.18N -150.57W, depth=16.9 km:
A light earthquake was located in NORTHERN ALASKA. This event was felt in Fairbanks.
This earthquake was:
12 miles ( 20 km) N of Manley Hot Springs
25 miles ( 41 km) SSW of Rampart
36 miles ( 58 km) W of Minto

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.