M4.3 earthquake 106 km NNW of Atka, Alaska
A magnitude 4.3 earthquake struck 106 km NNW of Atka, Alaska on Mon, Jul 25, 1983, 10:36 PM GMT-10 (08:36 UTC), 226 km (141 mi) below the surface.
A larger quake followed: M4.7 89 km W of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1983-07-26 08:36:59 UTC
- Depth
- 226.2 km (140.6 mi), intermediate-depth
- Epicenter
- 53.082° N, 174.790° 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 1.5 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 usp0001x4f. Read Tue, Sep 22, 2026, 9:33 PM UTC.