Weekly Seismicity Report For December 30, 2019 to January 5, 2020

During the week of December 30, 2019, the Alaska Earthquake Center reported 767 earthquakes within the state. The largest earthquake was magnitude 5.0 that occurred on January 1 at 23:54:35 AKST (January 2, 08:54:35 UTC), 147 miles SE of Old Harbor. 7 events were felt this week. There is continued activity near Elfin Cove after a series of minor to light earthquakes in December, and the Eastern Brooks Range/Kaktovik series, along with the Purcell Mountains swarms are continuing to be active.

Notable Events in Descending Order of Magnitude

Magnitude 5.0, 147 miles SE of Old Harbor, January 1 23:54:36 AKST
Magnitude 4.8, 52 miles S of Tanaga Volcano, January 1 06:05:56 AKST
Magnitude 4.7, 125 miles W of Attu, January 1 09:10:15 AKST
Magnitude 4.6, 25 miles S of Adak, December 31 18:20:27 AKST
Magnitude 4.5, 61 miles SW of Mt. Gareloi, January 4 19:59:53 AKST
Magnitude 4.4, 62 miles SW of Mt. Gareloi, January 2 03:03:58 AKST
Magnitude 4.3, 55 miles W of Elfin Cove, January 2 17:57:37 AKST
Magnitude 3.9, 49 miles SW of Kaktovik, January 3 04:16:18 AKST
Magnitude 3.8, 63 miles SW of Mt. Gareloi, January 2 02:50:52 AKST
Magnitude 3.8, 28 miles NW of Rampart, December 30 04:23:01 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.