M 3.8 - 166 km S of Akhiok, Alaska
A magnitude 3.8 earthquake was recorded by USGS near 166 km S of Akhiok. On the USGS Earthquake Hazards Program scale, M3.8 is classified "Minor". Among the 1,782 earthquake reports Areazine has published, this M3.8 event ranks stronger than 42% of them (rank #1,006 by magnitude).
This earthquake report, quickly
- Magnitude
- M 3.8
- USGS class
- Minor
- Location
- 166 km S of Akhiok
- Archive rank
- #1,006 of 1,782
- Source
- USGS
- Published
- September 21, 2026
Sits above 42% of the 1,782 earthquakes in the archive by magnitude; 1,005 ran stronger.
Record status: USGS's reading at the moment of detection — the agency keeps revising magnitude, aftershock counts, and felt reports on its own event page as more data arrives.
What Happened
A M 3.8 ml earthquake struck 166 km S of Akhiok, Alaska on 2026-10-20 at 12:26:50 UTC. The event had a depth of 57.2 km and was classified as an intermediate-depth earthquake (20-70 km).
Location Details
The epicenter was located at coordinates 55.453 latitude, -154.044 longitude, 166 km south of Akhiok, Alaska. The intermediate depth of 57.2 km places the event below the shallow crustal zone.
Impact Assessment
No felt reports were recorded. The Modified Mercalli Intensity was estimated at 1.029. No tsunami advisory was issued (tsunami field = 0) and no alert level was assigned.
What You Should Know
Earthquakes of this magnitude (M 2.5-3.9) are often felt but rarely cause damage. Aftershocks remain possible following any seismic event.
Source
Data from USGS: https://earthquake.usgs.gov/earthquakes/eventpage/aka2026steqzi
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Nationwide notices with similar length or severity timing 8
Beyond this USGS earthquake report's own category, Areazine surfaces two nationwide peer sets: length-matched and severity/date-matched notices from elsewhere in the archive, distinct from the same-feed Related list above.
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