M4.9 earthquake 271 km WSW of Adak, Alaska
A magnitude 4.9 earthquake struck 271 km WSW of Adak, Alaska on Thu, Oct 31, 1974, 5:04 PM GMT+12 (05:04 UTC), 66 km (41 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
- 1974-10-31 05:04:14 UTC
- Depth
- 66.0 km (41.0 mi), shallow
- Epicenter
- 51.161° N, 179.626° E
- 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
- 36
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
- 4.3234 km WSW of Adak, Alaska · 18963 days ago · 33 km deep · 49 km away
- 4.4Rat Islands, Aleutian Islands, Alaska · 18906 days ago · 54 km deep · 50 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00008mf. Read Sat, Oct 3, 2026, 1:43 PM UTC.