M4.9 earthquake 146 km WSW of Adak, Alaska
A magnitude 4.9 earthquake struck 146 km WSW of Adak, Alaska on Sat, Jan 10, 1987, 12:02 PM HAST (22:02 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.2 194 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
- 4.9 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-01-10 22:02:25 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.567° N, 178.695° 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 2 in the 30 days before it.
After
- 4.4219 km WSW of Adak, Alaska · 14507 days ago · 33 km deep · 80 km away
- 4.3Andreanof Islands, Aleutian Islands, Alaska · 14481 days ago · 102 km deep · 2 km away
- 6.2194 km WSW of Adak, Alaska · 14471 days ago · 33 km deep · 50 km away
- 5.4193 km WSW of Adak, Alaska · 14471 days ago · 33 km deep · 49 km away
- 4.8130 km WSW of Adak, Alaska · 14450 days ago · 33 km deep · 29 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00031k9. Read Fri, Oct 2, 2026, 9:17 AM UTC.