WEEK SEISMICITY REPORT FOR OCTOBER 14, 2024 TO OCTOBER 20, 2024

During the week of October 14, 2024, the Alaska Earthquake Center reported 919 earthquakes within the state. The largest earthquake was magnitude 5.3 that occurred on October 16 at 01:40:02 AKDT (October 16, 09:40:02 UTC), 142 miles SE of Westdahl Peak. This earthquake was not reported as felt, but generated 23 aftershocks throughout the week, ranging in magnitude from 2.3 to 3.2. 

There was one felt event this week, a magnitude 2.8 earthquake that occurred on October 15 at 02:43:13 AKDT, 7 miles NW of Anchorage. This event was reported as felt in Anchorage. 

There was increased earthquake swarm activity east of Atka this week, with 25 events recorded ranging in magnitude from 1.6 to 3.7. This swarm included 5 events of magnitude 3.0 or greater. 

Swarm activity continued south of Kaktovik throughout the week, albeit at a decreased rate compared to last week, with 65 events recorded ranging in magnitude from 1.2 to 2.8.

There was a landslide recorded in the Alaska Range 27 miles S of Kantishna, which occurred on October 16 at 16:00:13 AKDT, with a recorded magnitude of 1.5. 

17 icequakes were recorded this week in the Prince William Sound and Yakutat areas, ranging in magnitude from 1.0 to 1.6. 

NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE


Magnitude 5.3, 142 miles SE of Westdahl Peak, October 16 01:40:02 AKDT
Magnitude 4.3, 14 miles S of False Pass, October 18 11:59:42 AKDT
Magnitude 3.7, 21 miles E of Atka, October 17 09:02:48 AKDT
Magnitude 3.7, 42 miles E of Sand Point, October 16 12:48:59 AKDT
Magnitude 3.7, 156 miles SE of Old Crow, October 16 23:20:48 AKDT
Magnitude 3.5, 22 miles SE of Atka, October 16 03:10:22 AKDT
Magnitude 3.5, 83 miles SE of Akutan, October 16 12:37:55 AKDT
Magnitude 3.5, 19 miles NW of False Pass, October 20 10:43:05 AKDT
Magnitude 3.4, 115 miles S of Yunaska Island, October 20 07:21:53 AKDT
Magnitude 3.4, 44 miles E of Sand Point, October 15 15:48:27 AKDT

This report was compiled by Derreck Gossett

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.