M4.9 earthquake 288 km W of Adak, Alaska
A magnitude 4.9 earthquake struck 288 km W of Adak, Alaska on Mon, Sep 25, 1978, 9:25 PM GMT+12 (09:25 UTC), 130 km (81 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
- 1978-09-25 09:25:08 UTC
- Depth
- 130.0 km (80.8 mi), intermediate-depth
- Epicenter
- 52.049° N, 179.176° E
- 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
- 87
Nearby
Within 100 km, magnitude 1.9 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 usp0000wqn. Read Tue, Sep 22, 2026, 9:20 AM UTC.