M4.8 earthquake 65 km SSE of Atka, Alaska
A magnitude 4.8 earthquake struck 65 km SSE of Atka, Alaska on Sun, Aug 26, 1973, 6:37 PM GMT-10 (04:37 UTC), 45 km (28 mi) below the surface.
A larger quake followed: M5.1 62 km SE 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
- 4.8 (mb), light
- Local time
- UTC
- 1973-08-27 04:37:05 UTC
- Depth
- 45.0 km (28.0 mi), shallow
- Epicenter
- 51.696° N, 173.691° 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
- Stations used
- 53
Nearby
Within 100 km, magnitude 1.8 and up: 8 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.162 km SE of Atka, Alaska · 19384 days ago · 51 km deep · 5 km away
- 4.562 km SSE of Atka, Alaska · 19384 days ago · 58 km deep · 5 km away
- 4.646 km SE of Atka, Alaska · 19377 days ago · 42 km deep · 24 km away
- 4.976 km SE of Atka, Alaska · 19375 days ago · 42 km deep · 18 km away
- 4.567 km SSE of Atka, Alaska · 19360 days ago · 39 km deep · 14 km away
- 5.070 km SSE of Atka, Alaska · 19358 days ago · 36 km deep · 6 km away
- 4.1134 km SSE of Atka, Alaska · 19358 days ago · 33 km deep · 69 km away
- 5.4Andreanof Islands, Aleutian Islands, Alaska · 19358 days ago · 49 km deep · 6 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000381. Read Tue, Sep 22, 2026, 8:19 AM UTC.