M4.9 earthquake 125 km S of Unalaska, Alaska
A magnitude 4.9 earthquake struck 125 km S of Unalaska, Alaska on Mon, Dec 8, 1975, 11:19 AM GMT-10 (21:19 UTC), 19 km (12 mi) below the surface.
A larger quake followed: M5.2 110 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
- 4.9 (mb), light
- Local time
- UTC
- 1975-12-08 21:19:47 UTC
- Depth
- 19.0 km (11.8 mi), shallow
- Epicenter
- 52.764° N, 166.860° 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
- 17
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.140 km S of Unalaska, Alaska · 18554 days ago · 53 km deep · 85 km away
- 5.2110 km S of Unalaska, Alaska · 18531 days ago · 40 km deep · 16 km away
- 3.739 km S of Unalaska, Alaska · 18511 days ago · 104 km deep · 88 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000dv5. Read Mon, Sep 28, 2026, 8:52 PM UTC.