M4.6 earthquake 70 km S of Adak, Alaska
A magnitude 4.6 earthquake struck 70 km S of Adak, Alaska on Tue, Dec 2, 1986, 7:05 PM HAST (05:05 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 90 km ESE of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1986-12-03 05:05:33 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.255° N, 176.448° 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 1.6 and up: 7 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.290 km ESE of Adak, Alaska · 14532 days ago · 33 km deep · 84 km away
- 5.146 km SSW of Adak, Alaska · 14529 days ago · 33 km deep · 47 km away
- 4.687 km SE of Adak, Alaska · 14518 days ago · 33 km deep · 42 km away
- 4.969 km SW of Adak, Alaska · 14514 days ago · 33 km deep · 61 km away
- 5.065 km ESE of Adak, Alaska · 14505 days ago · 33 km deep · 57 km away
- 4.7100 km ESE of Adak, Alaska · 14505 days ago · 33 km deep · 73 km away
- 4.681 km SSE of Adak, Alaska · 14502 days ago · 33 km deep · 27 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00030k2. Read Tue, Sep 29, 2026, 1:36 PM UTC.