M5.1 earthquake 206 km W of Adak, Alaska
A magnitude 5.1 earthquake struck 206 km W of Adak, Alaska on Wed, Apr 13, 1977, 7:20 AM GMT-11 (18:20 UTC), 46 km (29 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb), moderate
- Local time
- UTC
- 1977-04-13 18:20:43 UTC
- Depth
- 46.0 km (28.6 mi), shallow
- Epicenter
- 51.699° N, 179.613° 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
- 57
Nearby
Within 100 km, magnitude 2.1 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.4232 km WSW of Adak, Alaska · 18058 days ago · 64 km deep · 58 km away
- 4.7186 km WSW of Adak, Alaska · 18052 days ago · 33 km deep · 76 km away
- 4.5173 km W of Adak, Alaska · 18004 days ago · 56 km deep · 34 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000nd9. Read Tue, Sep 22, 2026, 8:27 AM UTC.