M4.2 earthquake 50 km S of Tolsona, Alaska
A magnitude 4.2 earthquake struck 50 km S of Tolsona, Alaska on Sun, Jun 12, 1977, 12:09 PM GMT-9 (21:09 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1977-06-12 21:09:14 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 61.628° N, 146.153° 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
- 30
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000p8z. Read Wed, Sep 30, 2026, 5:01 PM UTC.