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M 3.3 Earthquake 129 km E of Chignik, Alaska

Source: USGS · Alaska

A magnitude 3.3 earthquake was recorded by USGS near 129 km E of Chignik. On the USGS Earthquake Hazards Program scale, M3.3 is classified "Minor". Among the 1,834 earthquake reports Areazine has published, this M3.3 event ranks stronger than 21% of them (rank #1,351 by magnitude).

This earthquake report, quickly

Magnitude
M 3.3
USGS class
Minor
Location
129 km E of Chignik
Archive rank
#1,351 of 1,834
Source
USGS
Published
September 25, 2026
MINOR

Stronger than 21% of the 1,834 earthquake reports in Areazine's archive, weaker than 1,350 others.

Record status: a point-in-time USGS detection. Aftershocks, revised magnitude, and felt-report data continue to update on USGS's own event page after publication.

What Happened

A magnitude 3.3 ml earthquake struck 129 km E of Chignik, Alaska on October 24, 2026 at 05:51:53 UTC. The event occurred at a depth of 6.3 km.

Location Details

The earthquake was located at coordinates 56.375°N, 156.314°W, 129 km east of Chignik, Alaska. The depth of 6.3 km is classified as shallow (less than 20 km).

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

This was a minor earthquake, which is often felt but rarely causes damage. Residents in the region should be aware of the possibility of aftershocks.

Source

Data from USGS: https://earthquake.usgs.gov/earthquakes/eventpage/aka2026tasxwj

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 (737 characters here).

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Similar severity timing

Same severity (low) notices issued closest in time to September 25, 2026.

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Questions & Answers

Questions readers often have about this USGS earthquake report.

What was the magnitude of this event? ▾
A magnitude 3.3 ml earthquake occurred 129 km east of Chignik, Alaska at a depth of 6.3 km.
What does a magnitude 3.3 ("Minor") earthquake mean? ▾
The USGS classifies M3.3 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 #1,351 strongest of the 1,834 earthquake reports in Areazine's archive by magnitude, stronger than 21% of them and weaker than 1,350 others.
Was Chignik likely to feel this earthquake? ▾
This event was centered 129 km E of Chignik. 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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