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M 3.1 Earthquake 77 km WSW of Akhiok, Alaska

Source: USGS · Alaska

A magnitude 3.1 earthquake was recorded by USGS near 77 km WSW of Akhiok. On the USGS Earthquake Hazards Program scale, M3.1 is classified "Minor". Among the 1,782 earthquake reports Areazine has published, this M3.1 event ranks stronger than 8% of them (rank #1,530 by magnitude).

Read this earthquake report in 30 seconds

Magnitude
M 3.1
USGS class
Minor
Location
77 km WSW of Akhiok
Archive rank
#1,530 of 1,782
Source
USGS
Published
September 21, 2026
MINOR

Out of 1,782 earthquake reports Areazine has logged, this one outranks 8% of them — 1,529 recorded a higher magnitude.

Record status: a snapshot from USGS, not a final record. Check USGS's own event page for aftershocks and any later revision to the magnitude shown here.

What Happened

A M 3.1 ml earthquake struck 77 km WSW of Akhiok, Alaska on 2026-10-20 at 12:52:47 UTC. The event occurred at a depth of 52 km, which is classified as intermediate depth (20-70 km).

Location Details

The earthquake was located at coordinates 56.675°N, 155.339°W. It occurred 77 km west-southwest of Akhiok, Alaska.

Impact Assessment

No felt reports were recorded. There was no tsunami advisory (tsunami flag: 0) and no alert level was issued.

What You Should Know

Earthquakes of this magnitude (M 2.5-3.9) are often felt but rarely cause damage. Residents in the region should be aware of the possibility of aftershocks.

Source

USGS Event Page

Original source: USGS Official Notice ↗

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Comparable nationwide notices (length or severity timing) 8

Two Areazine-derived peer sets for this USGS earthquake report: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.

Similar body length

Nearest notices by article body length (742 characters here).

Bushfire Alert for South Bowan Park Rd in Cabonne 742 chars NSW RFS Reports Planned Event Under Control at Black Springs Rd, St Fillans 742 chars Squall Watch in Effect for Western Lake Erie (Sep 4, 2026) 742 chars Yellow Frost Advisory - Woodstock and Carleton County 742 chars

Similar severity timing

Same severity (low) notices issued closest in time to September 21, 2026.

M 2.7 ml Earthquake Reported in England on September 21, 2026 low Yellow Frost Advisory for Red Lake - Woodland Caribou Park (Sep 21, 2026) low Yellow Frost Advisory for Nipigon - Rossport low M 2.7 ml Earthquake Reported in France on September 16, 2026 low

Questions & Answers

Questions readers often have about this USGS earthquake report.

How strong was this earthquake? ▾
A magnitude 3.1 earthquake occurred 77 km WSW of Akhiok, Alaska at a depth of 52 km.
What does an M3.1 "Minor" reading actually indicate? ▾
The USGS classifies M3.1 as "Minor" on its Earthquake Hazards Program scale. Events in this range are rarely felt beyond the immediate epicenter and typically cause no damage; most are recorded only by seismographs.
How does this compare with other earthquakes Areazine has reported? ▾
This is the #1,530 strongest of the 1,782 earthquake reports in Areazine's archive by magnitude, stronger than 8% of them and weaker than 1,529 others.
Was Akhiok likely to feel this earthquake? ▾
This event was centered 77 km WSW of Akhiok. Shaking intensity falls off sharply with distance from the epicenter and depends on depth and local geology, so check the USGS "Did You Feel It?" report for this event for real felt-shaking data rather than assuming from magnitude and distance alone.

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