M4.8 earthquake 24 km SE of Atka, Alaska
A magnitude 4.8 earthquake struck 24 km SE of Atka, Alaska on Mon, Oct 27, 1986, 5:27 AM HAST (15:27 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.5 89 km SSE 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
- 4.8 (mb), light
- Local time
- UTC
- 1986-10-27 15:27:15 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.060° N, 173.916° 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 1 in the 30 days before it.
After
- 4.535 km NNE of Atka, Alaska · 14580 days ago · 33 km deep · 48 km away
- 4.991 km SSW of Atka, Alaska · 14567 days ago · 33 km deep · 90 km away
- 5.589 km SSE of Atka, Alaska · 14564 days ago · 33 km deep · 71 km away
- 4.994 km S of Atka, Alaska · 14547 days ago · 33 km deep · 83 km away
- 4.895 km SSW of Atka, Alaska · 14530 days ago · 33 km deep · 87 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002zdn. Read Tue, Sep 29, 2026, 10:44 AM UTC.