M4.5 earthquake 173 km W of Adak, Alaska
A magnitude 4.5 earthquake struck 173 km W of Adak, Alaska on Mon, Jun 6, 1977, 5:51 PM GMT-10 (03:51 UTC), 56 km (35 mi) below the surface.
A larger quake followed: M4.7 197 km W 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
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1977-06-07 03:51:46 UTC
- Depth
- 56.0 km (34.8 mi), shallow
- Epicenter
- 51.659° N, 179.125° 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
- 17
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000p6p. Read Sun, Oct 4, 2026, 8:55 AM UTC.