M 5.3 - 151 km WSW of Adak, Alaska
A magnitude 5.3 earthquake was recorded by USGS near 151 km WSW of Adak. On the USGS Earthquake Hazards Program scale, M5.3 is classified "Moderate". Among the 1,699 earthquake reports Areazine has published, this M5.3 event ranks stronger than 80% of them (rank #257 by magnitude).
Read this earthquake report in 30 seconds
- Magnitude
- M 5.3
- USGS class
- Moderate
- Location
- 151 km WSW of Adak
- Archive rank
- #257 of 1,699
- Source
- USGS
- Published
- September 11, 2026
Stronger than 80% of the 1,699 earthquake reports in Areazine's archive, weaker than 256 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 5.3 mb earthquake struck 151 km WSW of Adak, Alaska, on 2026-09-11 at 12:07:12 UTC. The event was recorded at a depth of 40.892 km.
Location Details
The earthquake was located at coordinates 51.213°N, 178.5429°W. This places it 151 km west-southwest of Adak, Alaska. The depth of 40.892 km is classified as intermediate (20-70 km).
Impact Assessment
No felt reports were recorded. The Modified Mercalli Intensity reached 5.274. A tsunami flag of 1 was noted, though no specific advisory details were provided. No alert level was assigned.
What You Should Know
This was a moderate earthquake. Residents in the region should be aware of the possibility of aftershocks.
Source
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Nationwide notices with similar 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 (798 characters here).
Similar severity timing
Same severity (medium) notices issued closest in time to September 11, 2026.
Frequently Asked Questions
Common questions about this USGS earthquake report.