Monthly Seismicity Report For
April 1, 2017 to April 30, 2017

During April 2017, the Alaska Earthquake Center located 4057 earthquakes within the state. Of these, seventeen were larger than or equal to magnitude 4.0. Ten events were felt. The largest earthquake located in Alaska this month was a moderate earthquake of magnitude 5.6 that occurred on April  4 at 22:08:40.687 UTC (April  4, 14:08:40.687 AKDT), 54 miles SSE of Adak.

Notable Events in Descending Order of Magnitude

April  4 at 22:08:40.687 UTC (April  4, 14:08:40.687 AKDT), Ml 5.6, 51.14N -176.27W, depth=19.8 km:

   A moderate earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

   This event was felt in Atka.

    This earthquake was:

   54 miles ( 86 km) SSE of Adak

  115 miles (185 km)  SW of Atka

  201 miles (323 km) WSW of Amukta Pass

 

 April 27 at 14:46:31.675 UTC (April 27, 06:46:31.675 AKDT), Ml 5.4, 51.08N 178.70W, depth=1.0 km:

   A moderate earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.

    This earthquake was:

   34 miles ( 54 km) SSW of Amchitka

  147 miles (237 km)  SE of Buldir Is

  207 miles (334 km) WSW of Adak

 

 April  4 at 10:49:07.179 UTC (April  4, 02:49:07.179 AKDT), Ml 5.2, 51.39N -176.40W, depth=55.1 km:

   A moderate earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

    This earthquake was:

   35 miles ( 57 km) SSE of Adak

  109 miles (176 km) WSW of Atka

  198 miles (319 km)   E of Amchitka

 

 April 29 at 11:15:48.898 UTC (April 29, 03:15:48.898 AKDT), Ml 5.2, 63.12N -151.17W, depth=11.9 km:

   A moderate earthquake was located in CENTRAL ALASKA.

   This event was felt in Talkeetna, Cantwell, Healy, Chugiak, Palmer, and Anchorage.

    This earthquake was:

   28 miles ( 46 km) SSW of Kantishna

   63 miles (101 km)  SE of Lake Minchumina

   65 miles (104 km) NNW of Talkeetna

 

 April  4 at 12:42:23.673 UTC (April  4, 04:42:23.673 AKDT), Ml 5.0, 51.23N -176.33W, depth=26.6 km:

   A moderate earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

    This earthquake was:

   47 miles ( 75 km) SSE of Adak

  113 miles (181 km)  SW of Atka

  201 miles (323 km) WSW of Amukta Pass

 

 April 27 at 23:39:03.987 UTC (April 27, 15:39:03.987 AKDT), Ml 4.9, 51.04N 178.63W, depth=2.7 km:

   A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.

    This earthquake was:

   38 miles ( 61 km) SSW of Amchitka

  147 miles (236 km)  SE of Buldir Is

  211 miles (340 km) WSW of Adak

 

 April 24 at 07:25:31.523 UTC (April 23, 23:25:31.523 AKDT), Ml 4.7, 51.51N 179.10W, depth=64.9 km:

   A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.

    This earthquake was:

    5 miles (  8 km) ESE of Amchitka

  147 miles (237 km) ESE of Buldir Is

  183 miles (295 km)   W of Adak

 

 April 28 at 06:23:26.258 UTC (April 27, 22:23:26.258 AKDT), Ml 4.7, 51.43N -178.27W, depth=45.7 km:

   A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

    This earthquake was:

   76 miles (122 km) WSW of Adak

  118 miles (189 km)   E of Amchitka

  182 miles (292 km) WSW of Atka

 

 April 27 at 14:44:30.466 UTC (April 27, 06:44:30.466 AKDT), Ml 4.5, 57.53N -154.94W, depth=11.0 km:

   A light earthquake was located in KODIAK ISLAND REGION, ALASKA.

    This earthquake was:

   18 miles ( 30 km)   W of Karluk

   36 miles ( 58 km)   W of Larsen Bay

   50 miles ( 80 km)  NW of Akhiok

 

 April 27 at 15:58:49.309 UTC (April 27, 07:58:49.309 AKDT), Ml 4.3, 51.21N 178.62W, depth=29.2 km:

   A light earthquake was located in RAT ISLANDS, ALEUTIAN ISLANDS.

    This earthquake was:

   28 miles ( 44 km)  SW of Amchitka

  139 miles (224 km) ESE of Buldir Is

  208 miles (335 km)   W of Adak

 

 April  5 at 00:02:59.846 UTC (April  4, 16:02:59.846 AKDT), Ml 4.3, 51.06N -176.29W, depth=13.6 km:

   A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

    This earthquake was:

   58 miles ( 94 km) SSE of Adak

  119 miles (191 km)  SW of Atka

  204 miles (328 km) WSW of Amukta Pass

 

 April  4 at 15:20:47.252 UTC (April  4, 07:20:47.252 AKDT), Ml 4.1, 51.30N -176.42W, depth=41.4 km:

   A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

    This earthquake was:

   41 miles ( 66 km) SSE of Adak

  113 miles (182 km) WSW of Atka

  198 miles (318 km)   E of Amchitka

 

 April 26 at 03:29:10.198 UTC (April 25, 19:29:10.198 AKDT), Ml 4.1, 62.23N -149.35W, depth=41.7 km:

   A light earthquake was located in CENTRAL ALASKA.

   This event was felt in Talkeetna, Palmer, Eagle River, and Anchorage.

    This earthquake was:

   25 miles ( 41 km) ESE of Talkeetna

   32 miles ( 51 km)   N of Hatcher Pass

   39 miles ( 63 km) NNW of Sutton

 

 April  7 at 20:38:33.838 UTC (April  7, 12:38:33.838 AKDT), Ml 4.1, 59.95N -152.67W, depth=87.7 km:

   A light earthquake was located in SOUTHERN ALASKA.

   This event was felt in Anchor Point, Kasilof, Homer, Kenai, Anchorage, and Eagle River.

    This earthquake was:

   32 miles ( 51 km) WNW of Anchor Point

   35 miles ( 57 km) WSW of Ninilchik

   45 miles ( 72 km) WNW of Homer

 

 April 27 at 17:10:32.386 UTC (April 27, 09:10:32.386 AKDT), Ml 4.1, 57.53N -154.96W, depth=10.8 km:

   A light earthquake was located in KODIAK ISLAND REGION, ALASKA.

   This event was felt in Larson Bay.

    This earthquake was:

   19 miles ( 31 km)   W of Karluk

   37 miles ( 59 km)   W of Larsen Bay

   50 miles ( 81 km)  NW of Akhiok

 

 April 25 at 17:23:48.622 UTC (April 25, 09:23:48.622 AKDT), Ml 4.1, 55.00N -161.73W, depth=90.5 km:

   A light earthquake was located in ALASKA PENINSULA.

    This earthquake was:

   23 miles ( 38 km)   E of King Cove

   41 miles ( 67 km) ESE of Cold Bay

   54 miles ( 87 km) WSW of Sand Point

 

 April 11 at 04:03:33.389 UTC (April 10, 20:03:33.389 AKDT), Ml 4.0, 51.81N -179.50W, depth=88.2 km:

   A light earthquake was located in ANDREANOF ISLANDS, ALEUTIAN IS..

    This earthquake was:

   67 miles (108 km) ENE of Amchitka

  121 miles (195 km)   W of Adak

  198 miles (318 km)   E 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.