M4.6 earthquake 105 km S of Unalaska, Alaska
A magnitude 4.6 earthquake struck 105 km S of Unalaska, Alaska on Tue, Aug 5, 1986, 12:48 AM AKDT (08:48 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 57 km SE of Unalaska, 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
- 1986-08-05 08:48:13 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.929° N, 166.713° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 21 in the 30 days before it.
After
- 4.560 km WSW of Unalaska, Alaska · 14656 days ago · 33 km deep · 84 km away
- 4.857 km SE of Unalaska, Alaska · 14641 days ago · 33 km deep · 89 km away
- 4.560 km SW of Unalaska, Alaska · 14629 days ago · 33 km deep · 66 km away
- 4.657 km SW of Unalaska, Alaska · 14613 days ago · 33 km deep · 80 km away
Before
- 4.662 km SW of Unalaska, Alaska · 14662 days ago · 33 km deep · 72 km away
- 4.763 km SW of Unalaska, Alaska · 14663 days ago · 33 km deep · 65 km away
- 5.0112 km S of Unalaska, Alaska · 14667 days ago · 33 km deep · 11 km away
- 4.779 km SSW of Unalaska, Alaska · 14668 days ago · 33 km deep · 50 km away
- 4.3Fox Islands, Aleutian Islands, Alaska · 14671 days ago · 33 km deep · 81 km away
- 4.586 km ENE of Nikolski, Alaska · 14673 days ago · 33 km deep · 70 km away
- 4.350 km SSW of Unalaska, Alaska · 14675 days ago · 33 km deep · 65 km away
- 4.463 km SW of Unalaska, Alaska · 14675 days ago · 33 km deep · 63 km away
- 5.1Fox Islands, Aleutian Islands, Alaska · 14675 days ago · 33 km deep · 79 km away
- 6.064 km SW of Unalaska, Alaska · 14675 days ago · 33 km deep · 77 km away
- 4.948 km WSW of Unalaska, Alaska · 14675 days ago · 33 km deep · 87 km away
- 4.463 km SW of Unalaska, Alaska · 14675 days ago · 33 km deep · 72 km away
- 5.064 km WSW of Unalaska, Alaska · 14676 days ago · 33 km deep · 89 km away
- 4.257 km SW of Unalaska, Alaska · 14676 days ago · 33 km deep · 73 km away
- 4.862 km SW of Unalaska, Alaska · 14676 days ago · 33 km deep · 73 km away
- 4.563 km SW of Unalaska, Alaska · 14676 days ago · 33 km deep · 58 km away
- 6.051 km SW of Unalaska, Alaska · 14676 days ago · 33 km deep · 81 km away
- 5.274 km SE of Unalaska, Alaska · 14676 days ago · 33 km deep · 73 km away
- 5.672 km SE of Unalaska, Alaska · 14676 days ago · 33 km deep · 73 km away
- 4.458 km WSW of Unalaska, Alaska · 14676 days ago · 33 km deep · 84 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002ww3. Read Wed, Sep 23, 2026, 1:01 AM UTC.