M4.8 earthquake 166 km SW of Adak, Alaska
A magnitude 4.8 earthquake struck 166 km SW of Adak, Alaska on Sat, May 10, 1986, 7:10 PM HADT (04:10 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.7 226 km WSW 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
- 1986-05-11 04:10:50 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 50.904° N, 178.449° 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: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 5.3134 km WSW of Adak, Alaska · 14748 days ago · 33 km deep · 65 km away
- 4.7201 km WSW of Adak, Alaska · 14743 days ago · 33 km deep · 73 km away
- 4.7107 km SSW of Adak, Alaska · 14723 days ago · 33 km deep · 70 km away
- 4.9183 km SW of Adak, Alaska · 14710 days ago · 33 km deep · 24 km away
- 5.7226 km WSW of Adak, Alaska · 14696 days ago · 33 km deep · 98 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002tvy. Read Tue, Sep 29, 2026, 11:02 AM UTC.