M6.1 earthquake 246 km WSW of Adak, Alaska
A magnitude 6.1 earthquake struck 246 km WSW of Adak, Alaska on Sun, Nov 21, 1948, 9:06 PM GMT-12 (09:06 UTC), 25 km (16 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.1 (mw), strong
- Local time
- UTC
- 1948-11-22 09:06:58 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 50.945° N, 179.847° 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.
- Magnitude uncertainty
- ±0.26
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem897646. Read Tue, Sep 22, 2026, 7:53 AM UTC.