Minor Earthquake ● Closed

M4.0 Earthquake — 119 km E of Chignik, Alaska

Event time: Last updated: Sep 24, 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 119 km E of Chignik, Alaska at a depth of 17.9 km, recorded by the U.S. Geological Survey.

Measurements

MagnitudeM4.0
Depth17.9 km
Coordinates56.1990, -156.4880
Region119 km E of Chignik, 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

Also reported by: EMSC

This event as JSON · API and licence

Source updated 34 days ago (Sep 15, 2026 20:47 UTC) · we last heard from US Geological Survey 35 seconds ago

On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.

What has changed

  • Magnitude revised from M4.1 to M4.0 — Sep 15, 14:37 UTC by US Geological Survey
  • Magnitude revised from M4.3 to M4.1 — Sep 15, 14:36 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.

Drop, Cover, and Hold On — what to do before, during and after an earthquake, plus emergency kit and family plan checklists.

Open Earthquake Safety Guide →

Nearby & related events

M2.8 Earthquake — 59 km ESE of King Salmon, Alaska Minor Earthquake active via USGS 4 hr ago M3.5 Earthquake — 52 km E of Pedro Bay, Alaska Minor Earthquake active via USGS 20 hr ago M3.3 Earthquake — 46 km WSW of Ivanof Bay, Alaska Minor Earthquake active via USGS 23 hr ago M2.7 Earthquake — 120 km SE of Ugashik, Alaska Minor Earthquake active via USGS 23 hr ago M2.5 Earthquake — 70 km E of Port Alsworth, 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.