M4.9 earthquake 51 km ESE of Adak, Alaska
A magnitude 4.9 earthquake struck 51 km ESE of Adak, Alaska on Wed, Oct 22, 1980, 3:47 PM GMT-10 (01:47 UTC), 61 km (38 mi) below the surface.
A larger quake followed: M5.7 35 km ESE 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
- 4.9 (mb), light
- Local time
- UTC
- 1980-10-23 01:47:25 UTC
- Depth
- 61.0 km (37.9 mi), shallow
- Epicenter
- 51.720° N, 175.925° 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
- 26
Nearby
Within 100 km, magnitude 1.9 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.769 km NNE of Adak, Alaska · 16765 days ago · 178 km deep · 84 km away
- 5.735 km ESE of Adak, Alaska · 16741 days ago · 53 km deep · 17 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001acs. Read Tue, Sep 22, 2026, 4:53 PM UTC.