M4.6 earthquake 87 km SE of Adak, Alaska
A magnitude 4.6 earthquake struck 87 km SE of Adak, Alaska on Tue, Dec 30, 1986, 2:20 AM HAST (12:20 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 44 km SSW 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1986-12-30 12:20:00 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.254° N, 175.847° 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
- 5.065 km ESE of Adak, Alaska · 14510 days ago · 33 km deep · 36 km away
- 4.7100 km ESE of Adak, Alaska · 14510 days ago · 33 km deep · 33 km away
- 4.681 km SSE of Adak, Alaska · 14507 days ago · 33 km deep · 16 km away
- 4.781 km WSW of Atka, Alaska · 14472 days ago · 33 km deep · 76 km away
- 5.144 km SSW of Adak, Alaska · 14468 days ago · 33 km deep · 69 km away
- 5.094 km SSW of Atka, Alaska · 14467 days ago · 33 km deep · 75 km away
- 4.5106 km ESE of Adak, Alaska · 14465 days ago · 33 km deep · 48 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000319n. Read Sun, Oct 4, 2026, 3:30 PM UTC.