M4.3 earthquake 180 km WSW of Adak, Alaska
A magnitude 4.3 earthquake struck 180 km WSW of Adak, Alaska on Thu, Mar 11, 1976, 2:46 AM GMT-11 (13:46 UTC), 64 km (40 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
- 4.3 (mb), light
- Local time
- UTC
- 1976-03-11 13:46:31 UTC
- Depth
- 64.0 km (39.8 mi), shallow
- Epicenter
- 51.338° N, 179.087° 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
- 26
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.1191 km WSW of Adak, Alaska · 18461 days ago · 63 km deep · 22 km away
- 4.7179 km WSW of Adak, Alaska · 18436 days ago · 64 km deep · 11 km away
Before
- 4.3163 km WSW of Adak, Alaska · 18463 days ago · 64 km deep · 22 km away
- 4.8189 km WSW of Adak, Alaska · 18463 days ago · 58 km deep · 22 km away
- 4.7113 km WSW of Adak, Alaska · 18466 days ago · 54 km deep · 73 km away
- 4.3140 km WSW of Adak, Alaska · 18474 days ago · 30 km deep · 40 km away
- 4.8136 km WSW of Adak, Alaska · 18474 days ago · 32 km deep · 45 km away
- 4.9145 km WSW of Adak, Alaska · 18484 days ago · 39 km deep · 39 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000fdc. Read Sun, Sep 27, 2026, 5:12 PM UTC.