M4.7 earthquake 225 km W of Adak, Alaska
A magnitude 4.7 earthquake struck 225 km W of Adak, Alaska on Wed, Nov 18, 1987, 5:28 PM HAST (03:28 UTC), 88 km (55 mi) below the surface.
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
- 1987-11-19 03:28:57 UTC
- Depth
- 88.1 km (54.7 mi), intermediate-depth
- Epicenter
- 51.642° N, 179.872° 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
- CONSTRAINED_BY_DEPTH_PHASES
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.6211 km W of Adak, Alaska · 14144 days ago · 100 km deep · 15 km away
- 4.2243 km W of Adak, Alaska · 14144 days ago · 100 km deep · 19 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003a8n. Read Tue, Sep 22, 2026, 3:59 PM UTC.