M4.8 earthquake 64 km SSE of Adak, Alaska
A magnitude 4.8 earthquake struck 64 km SSE of Adak, Alaska on Thu, Nov 6, 1986, 9:45 AM HAST (19:45 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 90 km ESE 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
- 4.8 (mb), light
- Local time
- UTC
- 1986-11-06 19:45:40 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.306° N, 176.441° 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 1.8 and up: 7 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.792 km S of Adak, Alaska · 14562 days ago · 33 km deep · 28 km away
- 4.5103 km SSE of Adak, Alaska · 14552 days ago · 33 km deep · 43 km away
- 4.670 km S of Adak, Alaska · 14539 days ago · 33 km deep · 6 km away
- 5.290 km ESE of Adak, Alaska · 14526 days ago · 33 km deep · 81 km away
- 5.146 km SSW of Adak, Alaska · 14522 days ago · 33 km deep · 44 km away
- 4.687 km SE of Adak, Alaska · 14511 days ago · 33 km deep · 42 km away
- 4.969 km SW of Adak, Alaska · 14507 days ago · 33 km deep · 60 km away
Before
- 5.945 km S of Adak, Alaska · 14565 days ago · 33 km deep · 25 km away
- 4.868 km SE of Adak, Alaska · 14572 days ago · 33 km deep · 49 km away
- 4.7102 km SSE of Adak, Alaska · 14578 days ago · 33 km deep · 45 km away
- 5.254 km SSW of Adak, Alaska · 14579 days ago · 33 km deep · 31 km away
- 4.4136 km SE of Adak, Alaska · 14585 days ago · 33 km deep · 89 km away
- 5.690 km SW of Atka, Alaska · 14585 days ago · 33 km deep · 93 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002zrf. Read Tue, Sep 22, 2026, 11:28 PM UTC.