Monthly Seismicity Report For May 1, 2019 to May 31, 2019

During the month of May 2019, the Alaska Earthquake Center reported 3990 earthquakes within the state. The largest earthquake was magnitude 6.1 that occurred on May 23 at 00:45:16 AKST (May 23, 08:45:16 UTC), 49 miles SE of Mt. Gareloi, 128 miles ENE of Adak. There were also M5.8 89km SSW of Homer and two M4.5s in Rat Islands. The Purcell Mountains swarm of earthquakes and Offshore Kodiak aftershocks are still ongoing. At least twelve earthquakes were felt in May,  9 of them were  aftershocks of M7.1 Anchorage earthquake on November 30, 2018.  

Notable Events in Descending Order of Magnitude

Magnitude 6.1, 49 miles SE of Mt. Gareloi, May 22 22:45:17 AKST
Magnitude 5.9, 37 miles SW of Nanwalek, May 26 23:52:22 AKST
Magnitude 4.4, 44 miles SE of Mt. Gareloi, May 6 12:37:55 AKST
Magnitude 4.4, 11 miles SE of Chagulak Island, May 22 19:20:49 AKST
Magnitude 4.4, 40 miles S of Shungnak, May 8 19:29:59 AKST
Magnitude 4.3, 50 miles S of Tanaga Volcano, May 17 14:14:33 AKST
Magnitude 4.2, 12 miles E of Kasilof, May 10 13:52:46 AKST
Magnitude 4.2, 203 miles S of Akhiok, May 8 23:36:48 AKST
Magnitude 4.2, 1 miles NW of Great Sitkin Island, May 13 23:08:43 AKST
Magnitude 4.2, 21 miles NW of Amukta Pass, May 20 00:18:06 AKST

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 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.