M4.9 earthquake 139 km ENE of Atka, Alaska
A magnitude 4.9 earthquake struck 139 km ENE of Atka, Alaska on Sat, Apr 27, 1985, 10:24 AM HAST (20:24 UTC), 130 km (81 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1985-04-27 20:24:21 UTC
- Depth
- 130.2 km (80.9 mi), intermediate-depth
- Epicenter
- 52.775° N, 172.387° 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.
- Depth from
- FROM_LOCATION
Nearby
Within 100 km, magnitude 1.9 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002e7w. Read Tue, Sep 22, 2026, 4:53 PM UTC.