M4.9 earthquake 43 km SW of Unalaska, Alaska
A magnitude 4.9 earthquake struck 43 km SW of Unalaska, Alaska on Thu, Aug 24, 1978, 5:53 PM GMT-9 (02:53 UTC), 49 km (30 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1978-08-25 02:53:25 UTC
- Depth
- 49.0 km (30.4 mi), shallow
- Epicenter
- 53.599° N, 167.007° 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
- 45
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000w71. Read Tue, Sep 22, 2026, 4:55 PM UTC.