M4.9 earthquake 128 km WSW of Adak, Alaska
A magnitude 4.9 earthquake struck 128 km WSW of Adak, Alaska on Mon, Sep 7, 1981, 9:01 PM GMT-10 (07:01 UTC), 55 km (34 mi) below the surface.
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
- 1981-09-08 07:01:16 UTC
- Depth
- 55.0 km (34.2 mi), shallow
- Epicenter
- 51.468° N, 178.368° 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.
Nearby
Within 100 km, magnitude 1.9 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001frb. Read Wed, Sep 23, 2026, 2:37 AM UTC.