M 3.6 - 55 km SE of Chignik, Alaska
A magnitude 3.6 earthquake was recorded by USGS near 55 km SE of Chignik. On the USGS Earthquake Hazards Program scale, M3.6 is classified "Minor". Among the 1,740 earthquake reports Areazine has published, this M3.6 event ranks stronger than 36% of them (rank #1,059 by magnitude).
The earthquake report, at a glance
- Magnitude
- M 3.6
- USGS class
- Minor
- Location
- 55 km SE of Chignik
- Archive rank
- #1,059 of 1,740
- Source
- USGS
- Published
- September 20, 2026
Out of 1,740 earthquake reports Areazine has logged, this one outranks 36% of them — 1,058 recorded a higher magnitude.
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 magnitude 3.6 ml earthquake struck 55 km SE of Chignik, Alaska, on 2026-09-20 at 12:30:13 UTC. The hypocenter was at a depth of 33.7 km.
Location Details
The event was centered at latitude 55.946, longitude -157.772. This depth of 33.7 km places it in the intermediate range (20-70 km).
Impact Assessment
No felt reports were recorded. There was no tsunami advisory (tsunami flag 0) and no alert level assigned.
What You Should Know
This was a minor earthquake, which is often felt but rarely causes damage. Aftershocks are possible following any seismic event.
Source
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Similar notices nationwide by length or severity timing 8
Two cross-category peer sets, both computed from Areazine's own archive: notices with a similar body length, and notices near the same severity and agency date. These are drawn from other categories, not the same-feed Related list above.
Similar body length
Nearest notices by article body length (686 characters here).
Similar severity timing
Same severity (low) notices issued closest in time to September 20, 2026.
Frequently Asked Questions
Questions readers often have about this USGS earthquake report.