M4.4 earthquake 57 km ESE of Adak, Alaska
A magnitude 4.4 earthquake struck 57 km ESE of Adak, Alaska on Thu, Sep 22, 1977, 12:25 AM GMT-10 (10:25 UTC), 61 km (38 mi) below the surface.
A larger quake followed: M4.7 83 km S 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
- 1977-09-22 10:25:43 UTC
- Depth
- 61.0 km (37.9 mi), shallow
- Epicenter
- 51.660° N, 175.879° 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
- 14
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.783 km S of Adak, Alaska · 17878 days ago · 33 km deep · 88 km away
- 6.752 km ESE of Adak, Alaska · 17854 days ago · 33 km deep · 5 km away
- 5.287 km ESE of Adak, Alaska · 17854 days ago · 33 km deep · 30 km away
- 4.7103 km ESE of Adak, Alaska · 17854 days ago · 33 km deep · 47 km away
- 5.489 km SE of Adak, Alaska · 17854 days ago · 33 km deep · 34 km away
- 5.683 km ESE of Adak, Alaska · 17853 days ago · 33 km deep · 26 km away
- 4.8109 km SE of Adak, Alaska · 17852 days ago · 33 km deep · 55 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000qs1. Read Tue, Sep 22, 2026, 10:53 AM UTC.