M4.4 earthquake 232 km WSW of Adak, Alaska
A magnitude 4.4 earthquake struck 232 km WSW of Adak, Alaska on Wed, Apr 13, 1977, 10:32 PM GMT-11 (09:32 UTC), 64 km (40 mi) below the surface.
A larger quake followed: M4.7 186 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
- 4.4 (mb), light
- Local time
- UTC
- 1977-04-14 09:32:05 UTC
- Depth
- 64.0 km (39.8 mi), shallow
- Epicenter
- 51.193° N, 179.803° 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
- 34
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.7186 km WSW of Adak, Alaska · 18052 days ago · 33 km deep · 54 km away
- 4.5173 km W of Adak, Alaska · 18004 days ago · 56 km deep · 70 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000ndj. Read Tue, Sep 22, 2026, 9:41 AM UTC.