M4.9 earthquake 69 km SW of Adak, Alaska
A magnitude 4.9 earthquake struck 69 km SW of Adak, Alaska on Sat, Jan 3, 1987, 2:05 PM HAST (00:05 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
- 4.9 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-01-04 00:05:38 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.402° N, 177.294° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
What happened
The USGS’s account of the effects of this earthquake.
Felt (III) on Adak.
From the USGS event page for usp00031cq. U.S. Geological Survey text and figures are in the public domain.
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: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.9146 km WSW of Adak, Alaska · 14509 days ago · 33 km deep · 99 km away
- 4.681 km SSE of Adak, Alaska · 14504 days ago · 33 km deep · 87 km away
- 4.3Andreanof Islands, Aleutian Islands, Alaska · 14481 days ago · 102 km deep · 96 km away
- 5.144 km SSW of Adak, Alaska · 14465 days ago · 33 km deep · 37 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00031cq. Read Fri, Oct 2, 2026, 5:29 AM UTC.