M5.0 earthquake 27 km SW of Adak, Alaska
A magnitude 5.0 earthquake struck 27 km SW of Adak, Alaska on Tue, Oct 17, 1978, 10:50 AM GMT-10 (20:50 UTC), 61 km (38 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.0 (mb), moderate
- Local time
- UTC
- 1978-10-17 20:50:48 UTC
- Depth
- 61.0 km (37.9 mi), shallow
- Epicenter
- 51.722° N, 176.943° 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
- 44
Nearby
Within 100 km, magnitude 2.0 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.822 km WSW of Adak, Alaska · 17473 days ago · 51 km deep · 11 km away
- 4.6118 km SW of Adak, Alaska · 17449 days ago · 45 km deep · 91 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000x1g. Read Tue, Sep 22, 2026, 8:46 PM UTC.