M5.0 earthquake 177 km WSW of Adak, Alaska
A magnitude 5.0 earthquake struck 177 km WSW of Adak, Alaska on Wed, Aug 12, 1987, 4:19 PM HADT (01:19 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.0 (mb), moderate
- Local time
- UTC
- 1987-08-13 01:19:45 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.241° N, 178.976° 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 2.0 and up: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.3248 km WSW of Adak, Alaska · 14281 days ago · 33 km deep · 74 km away
- 4.4147 km WSW of Adak, Alaska · 14263 days ago · 33 km deep · 40 km away
- 4.7145 km WSW of Adak, Alaska · 14257 days ago · 33 km deep · 32 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00037fx. Read Tue, Sep 29, 2026, 11:08 PM UTC.