Minor Earthquake ● Closed

M3.1 Earthquake — 140 km S of Unalaska, Alaska

Event time: Last updated: Aug 20, 2026
Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.

Magnitude 3.1 earthquake 140 km S of Unalaska, Alaska at a depth of 20.6 km, recorded by the U.S. Geological Survey.

Measurements

MagnitudeM3.1
Depth20.6 km
Coordinates52.6100, -166.5960
Region140 km S of Unalaska, Alaska
Tsunami Flag0

Measured by

Earthquake data courtesy of the U.S. Geological Survey

This is a scientific measurement of an event that has already happened. It is not a warning, and it does not tell you what to do.

Not rated by source. US Geological Survey does not publish a severity for this; the level shown is our own classification.

View original report

This event as JSON · API and licence

Source updated 69 days ago (Aug 11, 2026 21:31 UTC) · we last heard from US Geological Survey 33 seconds ago

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General safety information

No authority has issued instructions for this event. The guidance below is general background reading, not a response to it.

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Nearby & related events

Shishaldin — Volcano Alert Level ADVISORY Moderate Volcanic Activity United States active via USGS_VOLCANO 2 hr ago M3.6 Earthquake — 115 km SSW of Nikolski, Alaska Minor Earthquake active via USGS 11 hr ago M4.0 Earthquake — Fox Islands, Aleutian Islands Minor Earthquake active via EMSC 17 hr ago M2.5 Earthquake — 124 km SE of Unalaska, Alaska Minor Earthquake active via USGS 1 day ago M3.8 Earthquake — 86 km SSW of Unalaska, Alaska Minor Earthquake active via USGS 1 day ago

Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.