M3.9 earthquake 88 km NW of Atka, Alaska
A magnitude 3.9 earthquake struck 88 km NW of Atka, Alaska on Sun, Apr 22, 1973, 4:00 AM GMT-11 (15:00 UTC), 211 km (131 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1973-04-22 15:00:38 UTC
- Depth
- 211.0 km (131.1 mi), intermediate-depth
- Epicenter
- 52.676° N, 175.233° 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
- 20
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.687 km NE of Adak, Alaska · 19518 days ago · 178 km deep · 44 km away
- 3.780 km NE of Adak, Alaska · 19513 days ago · 167 km deep · 51 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00001gr. Read Tue, Sep 29, 2026, 10:58 PM UTC.