M4.8 earthquake 72 km ESE of Adak, Alaska
A magnitude 4.8 earthquake struck 72 km ESE of Adak, Alaska on Wed, Aug 2, 1978, 12:12 AM GMT-10 (10:12 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
- 4.8 (mb), light
- Local time
- UTC
- 1978-08-02 10:12:12 UTC
- Depth
- 49.0 km (30.4 mi), shallow
- Epicenter
- 51.652° N, 175.648° 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
- 39
Nearby
Within 100 km, magnitude 1.8 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 usp0000vwp. Read Wed, Sep 23, 2026, 10:05 PM UTC.