WEEK SEISMICITY REPORT FOR DECEMBER 12, 2022 TO DECEMBER 18, 2022

During the week of December 12, 2022, the Alaska Earthquake Center reported 949 earthquakes within the state. The largest earthquake was magnitude 6.3 that occurred on December 14 at 09:40:26 AKST (December 14, 18:40:26 UTC), 18 miles W of Amchitka.

There were 66 aftershocks from this earthquake that occurred through December 18th.  They ranged in magnitude from M3.6 to M2.0. The depths ranged from around 55 km to 83 km.

The only noteworthy event that occurred outside the subduction zone was a M3.8 29 miles N of Tyonek.  Twelve volcanic events occurred this week around Katmai with magnitudes between M1.0-M2.4.

There were eleven icequakes recorded in Prince William Sound, Yakutat, and Icy Bay.  Three events were reported as felt with the largest being the M4.7 E of Seldovia.

NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE


Magnitude 6.3, 18 miles W of Amchitka, December 14 09:40:27 AKST
Magnitude 6.3, 15 miles NW of Amchitka, December 14 09:40:27 AKST
Magnitude 4.7, 39 miles E of Seldovia, December 11 23:09:02 AKST
Magnitude 4.2, 7 miles SE of Atka, December 15 18:09:54 AKST
Magnitude 4.1, 30 miles S of Atka Pass, December 12 06:02:53 AKST
Magnitude 4.0, 15 miles SW of Iliamna Volcano, December 17 20:38:24 AKST
Magnitude 3.8, 10 miles N of Semisopochnoi Island, December 13 12:45:04 AKST
Magnitude 3.8, 29 miles N of Tyonek, December 15 14:58:30 AKST
Magnitude 3.8, 16 miles W of Akhiok, December 15 21:29:57 AKST
Magnitude 3.6, 14 miles NW of Amchitka, December 14 09:46:07 AKST

This report was compiled by R. Wilkes

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 authorized or unauthorized use.

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