M4.1 earthquake 191 km WSW of Adak, Alaska
A magnitude 4.1 earthquake struck 191 km WSW of Adak, Alaska on Thu, Mar 11, 1976, 6:50 PM GMT-11 (05:50 UTC), 63 km (39 mi) below the surface.
A larger quake followed: M4.7 179 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
- 4.1 (mb), light
- Local time
- UTC
- 1976-03-12 05:50:16 UTC
- Depth
- 63.0 km (39.1 mi), shallow
- Epicenter
- 51.140° N, 179.135° 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
- 19
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 7 in the 30 days before it.
After
Before
- 4.3180 km WSW of Adak, Alaska · 18457 days ago · 64 km deep · 22 km away
- 4.3163 km WSW of Adak, Alaska · 18458 days ago · 64 km deep · 44 km away
- 4.8189 km WSW of Adak, Alaska · 18459 days ago · 58 km deep · 2 km away
- 4.7113 km WSW of Adak, Alaska · 18461 days ago · 54 km deep · 80 km away
- 4.3140 km WSW of Adak, Alaska · 18469 days ago · 30 km deep · 53 km away
- 4.8136 km WSW of Adak, Alaska · 18469 days ago · 32 km deep · 62 km away
- 4.9145 km WSW of Adak, Alaska · 18480 days ago · 39 km deep · 58 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000fds. Read Tue, Sep 22, 2026, 7:51 PM UTC.