M5.0 earthquake 70 km SSE of Atka, Alaska
A magnitude 5.0 earthquake struck 70 km SSE of Atka, Alaska on Sat, Sep 22, 1973, 8:36 AM GMT-10 (18:36 UTC), 36 km (22 mi) below the surface.
A larger quake followed: M5.4 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.0 (mb), moderate
- Local time
- UTC
- 1973-09-22 18:36:24 UTC
- Depth
- 36.0 km (22.4 mi), shallow
- Epicenter
- 51.642° N, 173.693° 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
- 83
Nearby
Within 100 km, magnitude 2.0 and up: 2 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.1134 km SSE of Atka, Alaska · 19358 days ago · 33 km deep · 63 km away
- 5.4Andreanof Islands, Aleutian Islands, Alaska · 19358 days ago · 49 km deep · 1 km away
Before
- 4.567 km SSE of Atka, Alaska · 19360 days ago · 39 km deep · 12 km away
- 4.976 km SE of Atka, Alaska · 19375 days ago · 42 km deep · 20 km away
- 4.646 km SE of Atka, Alaska · 19378 days ago · 42 km deep · 30 km away
- 4.562 km SSE of Atka, Alaska · 19384 days ago · 58 km deep · 9 km away
- 5.162 km SE of Atka, Alaska · 19384 days ago · 51 km deep · 11 km away
- 4.865 km SSE of Atka, Alaska · 19384 days ago · 45 km deep · 6 km away
- 4.769 km SE of Atka, Alaska · 19388 days ago · 38 km deep · 19 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003h3. Read Tue, Sep 22, 2026, 10:02 AM UTC.