M4.9 earthquake 41 km ENE of Adak, Alaska
A magnitude 4.9 earthquake struck 41 km ENE of Adak, Alaska on Sun, Apr 21, 1974, 4:29 PM GMT-10 (02:29 UTC), 70 km (43 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1974-04-22 02:29:40 UTC
- Depth
- 70.0 km (43.5 mi), intermediate-depth
- Epicenter
- 51.985° N, 176.057° 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
- 52
Nearby
Within 100 km, magnitude 1.9 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.715 km SSW of Adak, Alaska · 19154 days ago · 64 km deep · 54 km away
- 4.184 km WSW of Atka, Alaska · 19112 days ago · 62 km deep · 45 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000620. Read Sat, Oct 3, 2026, 4:29 PM UTC.