M5.5 earthquake 81 km SE of Akutan, Alaska
A magnitude 5.5 earthquake struck 81 km SE of Akutan, Alaska on Thu, Sep 23, 1971, 4:31 AM GMT-9 (13:31 UTC), 45 km (28 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1971-09-23 13:31:14 UTC
- Depth
- 45.0 km (28.0 mi), shallow
- Epicenter
- 53.699° N, 164.778° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.20
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem780549. Read Tue, Sep 22, 2026, 8:43 AM UTC.