Monthly Seismicity Report For February 1, 2019 to February 28, 2019

During the month of February 2019, the Alaska Earthquake Center reported 3608 earthquakes within the state. The largest event was magnitude 5.1 that occurred on February 15 at 13:54:14 AKST (February 15, 22:54:14 UTC), 150 miles E of Dutch Harbor. Some earthquakes of M4.8-4.1 occurred along the Aleutian chain. The offshore Kodiak aftershocks as well as the Kaktovik (NE  Brooks Range) aftershocks were still active. And of note,  an earthquake swarm area at the Purcell Mountains (42 miles south of Kobuk) started developing on February 10th by M4.8 earthquake followed by smaller earthquakes. There were ten felt events this month, seven of which were aftershocks of M7.1 November 30, 2018 Anchorage earthquake. The largest aftershock was M4.4 on February 18th.

Notable Events in Descending Order of Magnitude

Magnitude 5.1, 90 miles SE of Isanotski Peaks, February 15 12:54:15 AKST
Magnitude 4.8, 30 miles S of Adak, February 15 08:11:45 AKST
Magnitude 4.8, 40 miles S of Shungnak, February 10 03:35:48 AKST
Magnitude 4.4, 18 miles NE of Aniakchak Crater, February 1 05:09:39 AKST
Magnitude 4.4, 15 miles N of Elmendorf AFB, February 18 07:02:46 AKST
Magnitude 4.4, 45 miles SE of Amchitka, February 17 17:41:47 AKST
Magnitude 4.3, 38 miles SE of Amukta Pass, February 6 11:50:58 AKST
Magnitude 4.2, 53 miles SE of Atka, February 21 07:13:45 AKST
Magnitude 4.1, 14 miles NW of Elmendorf AFB, February 6 10:04:46 AKST
Magnitude 4.1, 3 miles SE of Semisopochnoi Island, February 12 21:09:12 AKST

This report was compiled by 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.