M4.7 earthquake 64 km SW of Adak, Alaska
A magnitude 4.7 earthquake struck 64 km SW of Adak, Alaska on Sat, Jul 4, 1981, 6:53 AM GMT-10 (16:53 UTC), 51 km (32 mi) below the surface.
A larger quake followed: M5.0 29 km SSW 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
- 4.7 (mb), light
- Local time
- UTC
- 1981-07-04 16:53:07 UTC
- Depth
- 51.1 km (31.8 mi), shallow
- Epicenter
- 51.498° N, 177.340° 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 1.7 and up: 3 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 usp0001eh3. Read Tue, Sep 22, 2026, 8:36 PM UTC.