Weekly Seismicity Report For July 17, 2017 to July 23, 2017

During the week of July 17, 2017, the Alaska Earthquake Center reported 717 earthquakes within the state. The largest earthquake was magnitude 4.8 that occurred on July 23 at 04:10:05.034 UTC (July 22, 20:10:05.034 AKDT), 118 miles NW of Attu. Three events were felt

Notable Events in Descending Order of Magnitude

July 23 at 04:10:05.034 UTC (July 22, 20:10:05.034 AKDT), Ml 4.8, 53.95N 170.94W, depth=46.9 km:

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

    This earthquake was:

  118 miles (189 km)  NW of Attu

  157 miles (252 km)  NW of Shemya

  208 miles (334 km) ESE of Bering Is, Komandorsky

  234 miles (377 km) WNW of Buldir Is

 

 July 18 at 20:18:39.011 UTC (July 18, 12:18:39.011 AKDT), Ml 4.5, 53.05N 171.86W, depth=2.3 km:

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

    This earthquake was:

   58 miles ( 93 km)   W of Attu

   97 miles (156 km) WNW of Shemya

  177 miles (285 km) WNW of Buldir Is

  268 miles (431 km) ESE of Bering Is, Komandorsky

 

 July 20 at 22:31:46.416 UTC (July 20, 14:31:46.416 AKDT), Ml 4.4, 53.99N 170.86W, depth=41.5 km:

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

    This earthquake was:

  122 miles (197 km)  NW of Attu

  161 miles (259 km)  NW of Shemya

  203 miles (327 km) ESE of Bering Is, Komandorsky

  239 miles (384 km) WNW of Buldir Is

 

 July 18 at 04:48:27.527 UTC (July 17, 20:48:27.527 AKDT), Ml 4.2, 53.47N 171.01W, depth=28.4 km:

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

    This earthquake was:

   99 miles (159 km) WNW of Attu

  139 miles (224 km) WNW of Shemya

  219 miles (352 km) WNW of Buldir Is

  223 miles (359 km) ESE of Bering Is, Komandorsky

 

 July 21 at 04:17:11.680 UTC (July 20, 20:17:11.680 AKDT), Ml 4.1, 52.91N 171.71W, depth=5.0 km:

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

    This earthquake was:

   63 miles (102 km)   W of Attu

  102 miles (163 km)   W of Shemya

  181 miles (291 km) WNW of Buldir Is

  267 miles (430 km) ESE of Bering Is, Komandorsky

 

 July 21 at 10:43:33.113 UTC (July 21, 02:43:33.113 AKDT), Ml 4.0, 53.66N 170.65W, depth=8.1 km:

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

    This earthquake was:

  118 miles (190 km) WNW of Attu

  158 miles (254 km) WNW of Shemya

  204 miles (328 km) ESE of Bering Is, Komandorsky

  237 miles (382 km) WNW of Buldir Is

 

 July 19 at 03:38:37.969 UTC (July 18, 19:38:37.969 AKDT), Ml 3.9, 52.76N -168.32W, depth=44.2 km:

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

    This earthquake was:

   26 miles ( 41 km) ESE of Nikolski

  106 miles (171 km)  SW of Unalaska

  108 miles (173 km)  SW of Dutch Harbor

  141 miles (228 km)  SW of Akutan

 

 July 21 at 05:24:14.859 UTC (July 20, 21:24:14.859 AKDT), Ml 3.9, 59.87N -136.72W, depth=4.4 km:

   A minor earthquake was located in SOUTHEASTERN ALASKA.

   It was felt in Haines.

    This earthquake was:

   44 miles ( 71 km)  NW of Klukwan

   57 miles ( 92 km) WNW of Skagway

   63 miles (101 km)  NW of Haines

   67 miles (107 km) SSE of Haines Junction

 

 July 18 at 23:42:40.571 UTC (July 18, 15:42:40.571 AKDT), Ml 3.7, 60.28N -150.97W, depth=62.8 km:

   A minor earthquake was located in KENAI PENINSULA, ALASKA.

   It was felt in Kenai, Soldontna, and Ninilchik.

    This earthquake was:

   11 miles ( 18 km) ESE of Kasilof

   15 miles ( 24 km) SSE of Soldotna

   15 miles ( 24 km) ENE of Clam Gulch

   19 miles ( 31 km) SSW of Sterling

 

 July 17 at 21:52:35.108 UTC (July 17, 13:52:35.108 AKDT), Ml 3.5, 60.99N -138.31W, depth=0.2 km:

   A minor earthquake was located in SOUTHERN YUKON TERRITORY, CANADA.

    This earthquake was:

   25 miles ( 40 km) ESE of Burwash Landing

   31 miles ( 50 km) WNW of Haines Junction

  111 miles (179 km) NNE of Yakutat

  113 miles (182 km) WNW of Whitehorse

 

 July 18 at 08:29:12 UTC (July 18, 12:29 AM AKDT), Ml 3.3, 60.5N -152.3W, depth=81 km:

   A minor earthquake was located in the Cook Inlet region of Alaska.

   It was felt in Soldotna Kenai and Anchorage.

    This earthquake was:

   31 miles ( 50 km) W of Kenai

   33 miles ( 52 km) NW of Clam Gulch

   33 miles ( 52 km) WNW of Kasilof

   35 miles ( 57 km) NNW of Ninilchik

 

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.