M4.6 earthquake 79 km E of Adak, Alaska
A magnitude 4.6 earthquake struck 79 km E of Adak, Alaska on Thu, Dec 10, 1987, 1:36 AM HAST (11:36 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.0 135 km SSW of Atka, 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), light
- Local time
- UTC
- 1987-12-10 11:36:41 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.898° N, 175.478° 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: 13 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.0135 km SSW of Atka, Alaska · 14162 days ago · 33 km deep · 93 km away
- 4.979 km SE of Adak, Alaska · 14161 days ago · 33 km deep · 70 km away
- 4.397 km SW of Atka, Alaska · 14151 days ago · 33 km deep · 46 km away
- 5.595 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 81 km away
- 5.5103 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 87 km away
- 5.2103 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 83 km away
- 5.1100 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 83 km away
- 4.735 km WSW of Atka, Alaska · 14132 days ago · 33 km deep · 58 km away
- 5.383 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 69 km away
- 5.193 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 77 km away
- 5.085 km S of Atka, Alaska · 14122 days ago · 33 km deep · 100 km away
- 5.085 km S of Atka, Alaska · 14122 days ago · 33 km deep · 97 km away
- 4.670 km S of Atka, Alaska · 14122 days ago · 33 km deep · 95 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003b59. Read Tue, Sep 22, 2026, 8:40 AM UTC.