Earthquake report · M 3.9

M3.9 earthquake 90 km SSW of Unalaska, Alaska

USGS · updated Oct 18, 2026, 08:12 UTC

A magnitude 3.9 earthquake was recorded on Oct 18, 2026, 4:02 AM (EDT) 90 km SSW of Unalaska, Alaska at a depth of 25 km, according to the U.S. Geological Survey (USGS). Data is preliminary and the magnitude may be revised.

Reported location · 53.10°, -166.95° ·

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Details

Source: usgs
Category: earthquake
Source status: active
Magnitude: 3.9
Depth (km): 25
Local time: Oct 18, 2026, 4:02 AM (EDT)
UTC time: 2026-10-18 08:02
Coordinates: 53.102, -166.952

Updates

M 3.9 - 90 km SSW of Unalaska, AlaskaOct 18, 2026, 08:12 UTC
M 3.9 - 90 km SSW of Unalaska, AlaskaOct 18, 2026, 08:11 UTC

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Saved source report · captured Oct 18, 2026, 08:13 UTC. Follow the issuing authority’s current instructions.