Weekly Seismicity Report For July 15, 2019 to July 21, 2019

During the week of July 15, 2019, the Alaska Earthquake Center reported 872 earthquakes within the state. The largest earthquake was magnitude 4.0 that occurred on July 17 at 22:23:58 AKST (July 18, 06:23:58 UTC), 38 miles S of Atka Pass. 2 events were felt this week, both of which were aftershocks of the November 30, 2018 magnitude 7.1 Anchorage earthquake. There is ongoing aftershock activity in Kaktovik and Offshore Kodiak, as well as continuing swarm activity in the Purcell Mountains. There is also continuing glacial calving activity in Icy Bay, as is usual this time of year.

Notable Events in Descending Order of Magnitude

Magnitude 4.0, 38 miles S of Atka Pass, July 17 20:23:58 AKST
Magnitude 3.8, 52 miles SE of King Cove, July 19 12:06:52 AKST
Magnitude 3.8, 54 miles S of Nikolski, July 17 13:47:42 AKST
Magnitude 3.7, 172 miles SE of Kodiak, July 17 15:28:23 AKST
Magnitude 3.7, 42 miles S of Shungnak, July 19 03:34:18 AKST
Magnitude 3.5, 183 miles SE of Kodiak, July 15 01:54:10 AKST
Magnitude 3.5, 70 miles N of Arctic Village, July 16 11:42:42 AKST
Magnitude 3.4, 90 miles SE of Westdahl Peak, July 18 03:40:59 AKST
Magnitude 3.4, 20 miles N of Augustine Volcano, July 19 06:04:59 AKST
Magnitude 3.4, 166 miles SE of Kodiak, July 18 10:22:31 AKST

This report was compiled by M. Braun.

The data in this report are preliminary and subject to revision. The earthquake parameters have been determined by the 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 damaged resulting from its authroized or unauthorized use.

For more information on earthquakes and seismology, contact the AEC at (907)-474-7320.