M5.7 earthquake 77 km SE of Atka, Alaska
A magnitude 5.7 earthquake struck 77 km SE of Atka, Alaska on Sat, Jul 23, 1966, 3:31 AM GMT-11 (14:31 UTC), 30 km (19 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.7 (mw), moderate
- Local time
- UTC
- 1966-07-23 14:31:50 UTC
- Depth
- 30.0 km (18.6 mi), shallow
- Epicenter
- 51.629° N, 173.539° 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
- ±0.20
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.7 and up: 0 in the 60 days after this one and 2 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem845756. Read Mon, Sep 28, 2026, 10:33 AM UTC.