Monthly Seismicity Report For April 1, 2018 to April 30, 2018

During April 2018, the Alaska Earthquake Center located 3427 earthquakes within the state. Of these, 26 were larger than or equal to magnitude 4.0. Two events were felt. The largest earthquake located in Alaska this month was a light earthquake of magnitude 4.7 that occurred on April 7 at 03:09:12.047 UTC (April 6, 19:09:12.047 AKDT), 163 miles ESE of Old Harbor.

Notable Events in Descending Order of Magnitude

April 7 at 03:09:12.047 UTC (April 6, 19:09:12.047 AKDT), Ml 4.7, 55.94N -149.68W, depth=2.1 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
163 miles (262 km) ESE of Old Harbor
164 miles (263 km) SE of Kodiak
173 miles (278 km) SE of Ouzinkie

April 24 at 12:01:30.740 UTC (April 24, 04:01:30.740 AKDT), Ml 4.5, 59.70N 179.68W, depth=8.6 km:
A light earthquake was located in BERING SEA.
This earthquake was:
266 miles (428 km) W of St. Matthew Is
395 miles (636 km) WNW of St. Paul
397 miles (639 km) SW of Gambell

April 1 at 01:40:59.454 UTC (March 31, 17:40:59.454 AKDT), Ml 4.5, 56.22N -149.17W, depth=11.7 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
163 miles (262 km) SE of Kodiak
171 miles (275 km) ESE of Old Harbor
172 miles (276 km) SE of Ouzinkie

April 18 at 17:13:51.730 UTC (April 18, 09:13:51.730 AKDT), Ml 4.5, 51.07N -179.95W, depth=29.0 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
55 miles ( 89 km) SE of Amchitka
152 miles (245 km) WSW of Adak
197 miles (317 km) ESE of Buldir Is

April 14 at 03:29:44.648 UTC (April 13, 19:29:44.648 AKDT), Ml 4.3, 54.29N -160.76W, depth=16.9 km:
A light earthquake was located in ALASKA PENINSULA.
This earthquake was:
73 miles (117 km) S of Sand Point
81 miles (131 km) SE of King Cove
100 miles (160 km) SE of Cold Bay

April 23 at 11:49:25.074 UTC (April 23, 03:49:25.074 AKDT), Ml 4.3, 50.08N 179.95W, depth=10.8 km:
A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
108 miles (174 km) SSE of Amchitka
193 miles (310 km) SW of Adak
234 miles (377 km) SE of Buldir Is

April 19 at 14:37:07.525 UTC (April 19, 06:37:07.525 AKDT), Ml 4.3, 53.39N -163.54W, depth=25.7 km:
A light earthquake was located in UNIMAK ISLAND REGION, ALASKA.
This earthquake was:
101 miles (163 km) S of False Pass
105 miles (168 km) ESE of Akutan
126 miles (202 km) SSW of King Cove

April 19 at 07:04:33.949 UTC (April 18, 23:04:33.949 AKDT), Ml 4.3, 51.03N -178.30W, depth=21.9 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
92 miles (148 km) SW of Adak
122 miles (196 km) ESE of Amchitka
193 miles (311 km) WSW of Atka

April 26 at 19:51:47.307 UTC (April 26, 11:51:47.307 AKDT), Ml 4.3, 53.38N -165.21W, depth=20.3 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
57 miles ( 92 km) SSE of Akutan
64 miles (103 km) ESE of Unalaska
64 miles (103 km) ESE of Dutch Harbor

April 16 at 14:51:28.681 UTC (April 16, 06:51:28.681 AKDT), Ml 4.2, 53.41N -163.53W, depth=9.4 km:
A light earthquake was located in UNIMAK ISLAND REGION, ALASKA.
This earthquake was:
99 miles (160 km) S of False Pass
104 miles (168 km) ESE of Akutan
124 miles (199 km) SSW of King Cove

April 1 at 19:49:25.166 UTC (April 1, 11:49:25.166 AKDT), Ml 4.2, 56.34N -148.33W, depth=11.9 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
183 miles (294 km) ESE of Kodiak
191 miles (307 km) ESE of Ouzinkie
197 miles (317 km) ESE of Old Harbor

April 29 at 15:38:36.586 UTC (April 29, 07:38:36.586 AKDT), Ml 4.2, 51.41N -177.48W, depth=22.0 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
48 miles ( 77 km) SW of Adak
150 miles (242 km) WSW of Atka
152 miles (244 km) E of Amchitka

April 23 at 16:00:52.389 UTC (April 23, 08:00:52.389 AKDT), Ml 4.2, 51.89N -170.74W, depth=25.6 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
62 miles (100 km) ESE of Amukta Pass
107 miles (172 km) SW of Nikolski
148 miles (239 km) E of Atka

April 28 at 07:45:32.262 UTC (April 27, 23:45:32.262 AKDT), Ml 4.2, 56.26N -148.72W, depth=12.0 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
174 miles (280 km) SE of Kodiak
183 miles (294 km) SE of Ouzinkie
186 miles (299 km) ESE of Old Harbor

April 25 at 10:42:23.039 UTC (April 25, 02:42:23.039 AKDT), Ml 4.2, 53.96N -163.60W, depth=15.1 km:
A light earthquake was located in UNIMAK ISLAND REGION, ALASKA.
This earthquake was:
62 miles (100 km) S of False Pass
89 miles (143 km) E of Akutan
92 miles (148 km) SSW of Cold Bay

April 18 at 17:24:45.810 UTC (April 18, 09:24:45.810 AKDT), Ml 4.1, 51.07N -180.00W, depth=4.8 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
54 miles ( 86 km) SE of Amchitka
154 miles (248 km) WSW of Adak
196 miles (315 km) ESE of Buldir Is

April 23 at 15:03:06.975 UTC (April 23, 07:03:06.975 AKDT), Ml 4.1, 51.82N -171.72W, depth=23.8 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
39 miles ( 62 km) SSE of Amukta Pass
109 miles (175 km) ESE of Atka
143 miles (230 km) WSW of Nikolski

April 11 at 10:34:13.226 UTC (April 11, 02:34:13.226 AKDT), Ml 4.1, 52.37N -173.96W, depth=182.9 km:
A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..
This earthquake was:
16 miles ( 26 km) NE of Atka
83 miles (133 km) W of Amukta Pass
119 miles (192 km) ENE of Adak

April 15 at 14:20:25.498 UTC (April 15, 06:20:25.498 AKDT), Ml 4.1, 56.37N -148.96W, depth=11.9 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
162 miles (261 km) SE of Kodiak
171 miles (275 km) SE of Ouzinkie
174 miles (280 km) ESE of Old Harbor

April 29 at 07:51:56.174 UTC (April 28, 23:51:56.174 AKDT), Ml 4.1, 55.90N -149.16W, depth=7.1 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
179 miles (288 km) SE of Kodiak
181 miles (292 km) ESE of Old Harbor
188 miles (302 km) SE of Ouzinkie

April 11 at 16:44:12.123 UTC (April 11, 08:44:12.123 AKDT), Ml 4.1, 60.58N -147.61W, depth=6.6 km:
A light earthquake was located in SOUTHERN ALASKA. It was felt in Kenai Peninsula and Anchorage area.
This earthquake was:
37 miles ( 59 km) NNE of Chenega Bay
37 miles ( 60 km) WSW of Tatitlek
39 miles ( 62 km) ESE of Whittier

April 2 at 10:09:34.893 UTC (April 2, 02:09:34.893 AKDT), Ml 4.1, 56.36N -148.89W, depth=11.5 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
165 miles (265 km) SE of Kodiak
173 miles (278 km) SE of Ouzinkie
177 miles (284 km) ESE of Old Harbor

April 2 at 09:05:18.536 UTC (April 2, 01:05:18.536 AKDT), Ml 4.1, 52.77N -168.54W, depth=40.9 km:
A light earthquake was located in FOX ISLANDS, ALEUTIAN ISLANDS.
This earthquake was:
18 miles ( 28 km) SE of Nikolski
112 miles (181 km) SW of Unalaska
114 miles (183 km) SW of Dutch Harbor

April 12 at 23:44:31.337 UTC (April 12, 15:44:31.337 AKDT), Ml 4.1, 60.87N -138.27W, depth=13.3 km:
A light earthquake was located in SOUTHERN YUKON TERRITORY, CANADA.
This earthquake was:
26 miles ( 42 km) WNW of Haines Junction
31 miles ( 49 km) SE of Burwash Landing
105 miles (168 km) NNE of Yakutat

April 3 at 03:46:22.706 UTC (April 2, 19:46:22.706 AKDT), Ml 4.0, 55.94N -149.94W, depth=12.0 km:
A light earthquake was located in GULF OF ALASKA.
This earthquake was:
155 miles (249 km) ESE of Old Harbor
158 miles (254 km) SE of Kodiak
167 miles (269 km) SE of Ouzinkie

April 21 at 22:31:24.095 UTC (April 21, 14:31:24.095 AKDT), Ml 4.0, 53.46N -163.68W, depth=31.1 km:
A light earthquake was located in UNIMAK ISLAND REGION, ALASKA.
This earthquake was:
97 miles (156 km) S of False Pass
97 miles (156 km) ESE of Akutan
120 miles (193 km) ESE 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 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.