M4.2 earthquake 35 km ESE of Ugashik, Alaska
A magnitude 4.2 earthquake struck 35 km ESE of Ugashik, Alaska on Thu, Sep 28, 1978, 1:41 PM GMT-9 (22:41 UTC), 115 km (71 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
- 1978-09-28 22:41:33 UTC
- Depth
- 115.0 km (71.5 mi), intermediate-depth
- Epicenter
- 57.364° N, 156.877° 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
- 38
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
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 usp0000wsf. Read Tue, Sep 22, 2026, 12:12 PM UTC.