M5.2 earthquake 70 km S of Atka, Alaska
A magnitude 5.2 earthquake struck 70 km S of Atka, Alaska on Sun, Jul 4, 1971, 8:41 AM GMT-10 (18:41 UTC), 28 km (17 mi) below the surface.
A larger quake followed: M5.4 71 km S 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
- 5.2 (mw), moderate
- Local time
- UTC
- 1971-07-04 18:41:39 UTC
- Depth
- 27.9 km (17.3 mi), shallow
- Epicenter
- 51.561° N, 174.115° 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.
- Magnitude uncertainty
- ±0.52
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.2 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 iscgem781918. Read Tue, Sep 22, 2026, 8:06 AM UTC.