M4.8 earthquake 104 km SSW of Atka, Alaska
A magnitude 4.8 earthquake struck 104 km SSW of Atka, Alaska on Fri, Aug 23, 1985, 2:16 AM HADT (11:16 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1985-08-23 11:16:03 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.355° N, 174.888° 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
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 1.8 and up: 0 in the 60 days after this one and 6 in the 30 days before it.
Before
- 4.8101 km SSW of Atka, Alaska · 15005 days ago · 33 km deep · 4 km away
- 4.8Andreanof Islands, Aleutian Islands, Alaska · 15005 days ago · 33 km deep · 5 km away
- 4.799 km SSW of Atka, Alaska · 15005 days ago · 33 km deep · 9 km away
- 4.799 km SSW of Atka, Alaska · 15005 days ago · 33 km deep · 13 km away
- 3.897 km SSW of Atka, Alaska · 15005 days ago · 33 km deep · 12 km away
- 4.5101 km SSW of Atka, Alaska · 15006 days ago · 33 km deep · 4 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002j1x. Read Tue, Sep 22, 2026, 8:58 PM UTC.