M4.7 earthquake 33 km WSW of Adak, Alaska
A magnitude 4.7 earthquake struck 33 km WSW of Adak, Alaska on Tue, Dec 13, 1983, 10:48 AM HAST (20:48 UTC), 79 km (49 mi) below the surface.
A larger quake followed: M5.1 83 km WNW 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
- 4.7 (mb), light
- Local time
- UTC
- 1983-12-13 20:48:47 UTC
- Depth
- 78.8 km (49.0 mi), intermediate-depth
- Epicenter
- 51.785° N, 177.094° 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.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.183 km WNW of Adak, Alaska · 15616 days ago · 111 km deep · 58 km away
- 4.416 km ENE of Adak, Alaska · 15606 days ago · 57 km deep · 50 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00020fj. Read Tue, Sep 29, 2026, 11:37 AM UTC.