M4.6 earthquake 60 km SSE of Atka, Alaska
A magnitude 4.6 earthquake struck 60 km SSE of Atka, Alaska on Mon, Aug 29, 1977, 12:03 PM GMT-10 (22:03 UTC), 37 km (23 mi) below the surface.
A larger quake followed: M5.4 95 km SSE 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
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1977-08-29 22:03:37 UTC
- Depth
- 37.0 km (23.0 mi), shallow
- Epicenter
- 51.668° N, 174.023° 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
- 24
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.861 km SSE of Atka, Alaska · 17930 days ago · 30 km deep · 6 km away
- 4.654 km SSE of Atka, Alaska · 17930 days ago · 42 km deep · 6 km away
- 5.495 km SSE of Atka, Alaska · 17929 days ago · 33 km deep · 36 km away
- 4.881 km SSE of Atka, Alaska · 17928 days ago · 43 km deep · 22 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000qd2. Read Thu, Oct 1, 2026, 7:33 PM UTC.