M4.9 earthquake 174 km SSE of Adak, Alaska
A magnitude 4.9 earthquake struck 174 km SSE of Adak, Alaska on Wed, Mar 19, 1975, 5:23 PM GMT-10 (03:23 UTC), 27 km (17 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1975-03-20 03:23:33 UTC
- Depth
- 27.0 km (16.8 mi), shallow
- Epicenter
- 50.356° N, 175.999° 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
- 71
Nearby
Within 100 km, magnitude 1.9 and up: 1 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 usp0000aah. Read Tue, Sep 22, 2026, 7:26 AM UTC.