M5.6 earthquake 104 km SW of Adak, Alaska
A magnitude 5.6 earthquake struck 104 km SW of Adak, Alaska on Thu, Dec 17, 1964, 12:44 PM GMT-11 (23:44 UTC), 40 km (25 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (mw), moderate
- Local time
- UTC
- 1964-12-17 23:44:46 UTC
- Depth
- 40.0 km (24.9 mi), shallow
- Epicenter
- 51.336° N, 177.870° 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
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 iscgem862004 (also filed as ushis2735). Read Mon, Sep 21, 2026, 9:47 PM UTC.