M4.1 earthquake 134 km SSE of Atka, Alaska
A magnitude 4.1 earthquake struck 134 km SSE of Atka, Alaska on Sat, Sep 22, 1973, 9:08 AM GMT-10 (19:08 UTC), 33 km (21 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
- 4.1 (mb), light
- Local time
- UTC
- 1973-09-22 19:08:02 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.137° N, 173.274° 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
- 11
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 8 in the 30 days before it.
After
Before
- 5.070 km SSE of Atka, Alaska · 19358 days ago · 36 km deep · 63 km away
- 4.567 km SSE of Atka, Alaska · 19360 days ago · 39 km deep · 69 km away
- 4.976 km SE of Atka, Alaska · 19376 days ago · 42 km deep · 64 km away
- 4.646 km SE of Atka, Alaska · 19378 days ago · 42 km deep · 91 km away
- 4.562 km SSE of Atka, Alaska · 19384 days ago · 58 km deep · 72 km away
- 5.162 km SE of Atka, Alaska · 19385 days ago · 51 km deep · 73 km away
- 4.865 km SSE of Atka, Alaska · 19385 days ago · 45 km deep · 69 km away
- 4.769 km SE of Atka, Alaska · 19388 days ago · 38 km deep · 70 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003h4. Read Tue, Sep 22, 2026, 9:35 PM UTC.