Alaska earthquakes

M5.1 earthquake 261 km W of Adak, Alaska

A magnitude 5.1 earthquake struck 261 km W of Adak, Alaska on Thu, Jun 19, 1986, 11:17 AM GMT+12 (23:17 UTC), 171 km (106 mi) below the surface.

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The earthquake

Magnitude
5.1 (mb), moderate
Local time
UTC
1986-06-18 23:17:58 UTC
Depth
170.9 km (106.2 mi), intermediate-depth
Epicenter
52.317° N, 179.615° E
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
CONSTRAINED_BY_DEPTH_PHASES

Nearby

Within 100 km, magnitude 2.1 and up: 1 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.2239 km WSW of Adak, Alaska · 14696 days ago · 33 km deep · 97 km away

Before

  1. 4.2203 km W of Adak, Alaska · 14742 days ago · 33 km deep · 88 km away
  2. 5.2212 km W of Adak, Alaska · 14742 days ago · 33 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002v68. Read Tue, Sep 29, 2026, 10:34 AM UTC.