M4.9 earthquake 94 km S of Atka, Alaska
A magnitude 4.9 earthquake struck 94 km S of Atka, Alaska on Mon, Dec 1, 1986, 1:07 PM HAST (23:07 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
- 4.9 (mb), light
- Local time
- UTC
- 1986-12-01 23:07:10 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.348° N, 174.278° 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 1.9 and up: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.290 km ESE of Adak, Alaska · 14525 days ago · 33 km deep · 83 km away
- 4.895 km SSW of Atka, Alaska · 14524 days ago · 33 km deep · 14 km away
- 3.950 km WSW of Atka, Alaska · 14505 days ago · 33 km deep · 89 km away
- 4.7100 km ESE of Adak, Alaska · 14498 days ago · 33 km deep · 79 km away
- 5.269 km SSW of Atka, Alaska · 14490 days ago · 33 km deep · 28 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00030jd. Read Tue, Sep 22, 2026, 9:31 PM UTC.