M4.3 earthquake 174 km WSW of Adak, Alaska
A magnitude 4.3 earthquake struck 174 km WSW of Adak, Alaska on Sun, Sep 29, 1974, 10:35 PM GMT-10 (08:35 UTC), 53 km (33 mi) below the surface.
A larger quake followed: M5.8 105 km WSW of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1974-09-30 08:35:05 UTC
- Depth
- 53.0 km (32.9 mi), shallow
- Epicenter
- 51.424° N, 179.047° 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
- 17
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000087e. Read Thu, Oct 1, 2026, 8:00 PM UTC.