M4.9 earthquake 145 km WSW of Adak, Alaska
A magnitude 4.9 earthquake struck 145 km WSW of Adak, Alaska on Tue, Feb 17, 1976, 9:00 PM GMT-11 (08:00 UTC), 39 km (24 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), light
- Local time
- UTC
- 1976-02-18 08:00:58 UTC
- Depth
- 39.0 km (24.2 mi), shallow
- Epicenter
- 51.573° N, 178.676° 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
- 45
Nearby
Within 100 km, magnitude 1.9 and up: 8 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.8136 km WSW of Adak, Alaska · 18469 days ago · 32 km deep · 9 km away
- 4.3140 km WSW of Adak, Alaska · 18469 days ago · 30 km deep · 20 km away
- 4.7113 km WSW of Adak, Alaska · 18460 days ago · 54 km deep · 51 km away
- 4.8189 km WSW of Adak, Alaska · 18458 days ago · 58 km deep · 56 km away
- 4.3163 km WSW of Adak, Alaska · 18458 days ago · 64 km deep · 18 km away
- 4.3180 km WSW of Adak, Alaska · 18457 days ago · 64 km deep · 39 km away
- 4.1191 km WSW of Adak, Alaska · 18456 days ago · 63 km deep · 58 km away
- 4.7179 km WSW of Adak, Alaska · 18431 days ago · 64 km deep · 35 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000f3q (also filed as iscgem717981). Read Tue, Sep 22, 2026, 7:25 AM UTC.