Minor Earthquake ● Closed

M4.0 Earthquake — 152 km WSW of Elfin Cove, Alaska

Event time: Last updated: Sep 16, 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 4.0 earthquake 152 km WSW of Elfin Cove, Alaska at a depth of 16.1 km, recorded by the U.S. Geological Survey.

Measurements

MagnitudeM4.0
Depth16.1 km
Coordinates57.9140, -138.8740
Region152 km WSW of Elfin Cove, Alaska
Felt Reports1
Tsunami Flag0
Usgs Alertgreen

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 41 days ago (Sep 7, 2026 22:37 UTC) · we last heard from US Geological Survey 48 seconds ago

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What has changed

  • Magnitude revised from M3.8 to M4.0 — Sep 7, 17:20 UTC by US Geological Survey
  • Magnitude revised from M3.7 to M3.8 — Sep 7, 17:09 UTC by US Geological Survey
  • Magnitude revised from M3.9 to M3.7 — Sep 7, 02:05 UTC by US Geological Survey
  • Magnitude revised from M2.6 to M3.9 — Sep 7, 02:04 UTC by US Geological Survey

Figures published in the first minutes of an event are preliminary. A change here is the agency refining its own estimate, not a correction to this page.

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

M3.2 Earthquake — 108 km N of Yakutat, Alaska Minor Earthquake active via USGS 1 day ago M3.1 Earthquake — 102 km N of Yakutat, Alaska Minor Earthquake monitoring via USGS 4 days ago M2.6 Earthquake — 112 km N of Yakutat, Alaska Minor Earthquake closed via USGS Oct 9, 2026 M2.6 Earthquake — 148 km SSE of Alcan Border, Alaska Minor Earthquake closed via USGS Oct 7, 2026 M3.0 Earthquake — 62 km WNW of Elfin Cove, Alaska Minor Earthquake closed via USGS Oct 4, 2026

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.