M4.6 earthquake 21 km SSE of Old Harbor, Alaska
A magnitude 4.6 earthquake struck 21 km SSE of Old Harbor, Alaska on Mon, May 23, 1977, 4:59 AM GMT-9 (13:59 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1977-05-23 13:59:47 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 57.018° N, 153.231° 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
- 20
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 2 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 usp0000p06. Read Tue, Sep 22, 2026, 8:24 AM UTC.