M5.0 earthquake 146 km WSW of Adak, Alaska
A magnitude 5.0 earthquake struck 146 km WSW of Adak, Alaska on Fri, Oct 3, 1986, 6:21 AM HADT (15:21 UTC), 33 km (21 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
- 1986-10-03 15:21:03 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.498° N, 178.660° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 2.0 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 usp0002yna. Read Tue, Sep 22, 2026, 8:11 PM UTC.