M3.8 earthquake 33 km WSW of Unalaska, Alaska
A magnitude 3.8 earthquake struck 33 km WSW of Unalaska, Alaska on Fri, Jul 13, 1979, 11:33 PM GMT-9 (08:33 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.1 105 km S of Unalaska, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb), minor
- Local time
- UTC
- 1979-07-14 08:33:14 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.709° N, 166.962° 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
- 18
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.1105 km S of Unalaska, Alaska · 17228 days ago · 33 km deep · 92 km away
- 4.6Fox Islands, Aleutian Islands, Alaska · 17180 days ago · 15 km deep · 80 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00011v2. Read Tue, Sep 22, 2026, 7:57 AM UTC.