M4.6 earthquake 31 km WSW of Unalaska, Alaska
A magnitude 4.6 earthquake struck 31 km WSW of Unalaska, Alaska on Fri, Sep 21, 1979, 6:49 PM GMT-9 (03:49 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1979-09-22 03:49:27 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.730° N, 166.953° 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.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 25
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001321. Read Tue, Sep 22, 2026, 3:40 AM UTC.