M5.0 earthquake 231 km W of Adak, Alaska
A magnitude 5.0 earthquake struck 231 km W of Adak, Alaska on Fri, Nov 25, 1977, 12:37 PM GMT-11 (23:37 UTC), 88 km (55 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.0 (mb), moderate
- Local time
- UTC
- 1977-11-25 23:37:13 UTC
- Depth
- 88.0 km (54.7 mi), intermediate-depth
- Epicenter
- 51.859° N, 179.989° 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
- 55
Nearby
Within 100 km, magnitude 2.0 and up: 0 in the 60 days after this one and 3 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000rsd. Read Wed, Sep 30, 2026, 6:02 AM UTC.