M6.1 earthquake 286 km ESE of Attu Station, Alaska
A magnitude 6.1 earthquake struck 286 km ESE of Attu Station, Alaska on Tue, Aug 22, 1939, 3:19 AM GMT+12 (15:19 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.1 (mw), strong
- Local time
- UTC
- 1939-08-21 15:19:11 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.760° N, 176.989° E
- 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
- ±0.35
- Depth from
- From location
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 iscgem902123 (also filed as ushis1266). Read Tue, Sep 22, 2026, 10:25 PM UTC.