M4.1 earthquake 48 km ESE of Adak, Alaska
A magnitude 4.1 earthquake struck 48 km ESE of Adak, Alaska on Wed, Mar 2, 1977, 11:14 PM GMT-11 (10:14 UTC), 63 km (39 mi) below the surface.
A larger quake followed: M4.3 85 km SSE of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb), light
- Local time
- UTC
- 1977-03-03 10:14:02 UTC
- Depth
- 63.0 km (39.1 mi), shallow
- Epicenter
- 51.750° N, 175.965° 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
- 21
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000msj. Read Tue, Sep 22, 2026, 7:24 AM UTC.