M3.9 earthquake 58 km S of Adak, Alaska
A magnitude 3.9 earthquake struck 58 km S of Adak, Alaska on Tue, Dec 6, 1983, 10:28 AM HAST (20:28 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.7 33 km WSW 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
- 3.9 (mb), minor
- Local time
- UTC
- 1983-12-06 20:28:57 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.361° N, 176.788° 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 1.5 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.733 km WSW of Adak, Alaska · 15624 days ago · 79 km deep · 52 km away
- 4.416 km ENE of Adak, Alaska · 15599 days ago · 57 km deep · 66 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00020ap. Read Tue, Sep 22, 2026, 9:13 AM UTC.