Earthquake report · M 3.9

M3.9 earthquake 107 km SSE of Adak, Alaska

USGS · updated Oct 17, 2026, 04:19 UTC

A magnitude 3.9 earthquake was recorded on Oct 16, 2026, 11:33 PM (EDT) 107 km SSE of Adak, Alaska at a depth of 11 km, according to the U.S. Geological Survey (USGS). Data is preliminary and the magnitude may be revised.

Reported location · 50.95°, -176.17° ·

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Details

Source: usgs
Category: earthquake
Source status: active
Magnitude: 3.9
Depth (km): 11
Local time: Oct 16, 2026, 11:33 PM (EDT)
UTC time: 2026-10-17 03:33
Coordinates: 50.952, -176.173

Updates

M 3.9 - 107 km SSE of Adak, AlaskaOct 17, 2026, 04:19 UTC

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Saved source report · captured Oct 22, 2026, 03:03 UTC. Follow the issuing authority’s current instructions.