M4.0 earthquake 38 km SW of Unalaska, Alaska
A magnitude 4.0 earthquake struck 38 km SW of Unalaska, Alaska on Sat, Dec 22, 1979, 9:24 PM GMT-10 (07:24 UTC), 83 km (52 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb), light
- Local time
- UTC
- 1979-12-23 07:24:44 UTC
- Depth
- 83.0 km (51.6 mi), intermediate-depth
- Epicenter
- 53.639° N, 166.968° 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.
- Stations used
- 15
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 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 usp00014nq. Read Tue, Sep 22, 2026, 9:37 PM UTC.