M4.6 earthquake 73 km SSE of Ugashik, Alaska
A magnitude 4.6 earthquake struck 73 km SSE of Ugashik, Alaska on Mon, Jun 19, 1978, 5:30 PM GMT-9 (02:30 UTC), 99 km (62 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
- 1978-06-20 02:30:08 UTC
- Depth
- 99.0 km (61.5 mi), intermediate-depth
- Epicenter
- 56.873° N, 157.088° 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
- 85
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000v5e. Read Tue, Sep 22, 2026, 9:39 AM UTC.