M6.8 earthquake 57 km SSW of Atka, Alaska
A magnitude 6.8 earthquake struck 57 km SSW of Atka, Alaska on Fri, Nov 1, 1946, 12:14 AM GMT-11 (11:14 UTC), 25 km (16 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.8 (mw), strong
- Local time
- UTC
- 1946-11-01 11:14:27 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 51.700° N, 174.437° W
- Region
- Alaska
- Strongest shaking
- VI, strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VI, strong shaking
- Peak ground acceleration
- 18.3% of gravity
- Peak ground velocity
- 2.6 cm/s
- Map
- Automatic
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
- ±0.37
- 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 iscgem898643 (also filed as ushis1565). Read Tue, Sep 22, 2026, 4:51 AM UTC.