M5.0 Earthquake — Mariana Islands Region

Measurements

Measured by

Earthquake data courtesy of EMSC

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. European-Mediterranean Seismological Centre does not publish a severity for this; the level shown is our own classification.

Also reported by: USGS

This event as JSON · API and licence

Source updated 14 days ago (Oct 5, 2026 13:40 UTC) · we last heard from European-Mediterranean Seismological Centre 35 seconds ago

What has changed

• Magnitude revised from M5.1 to M5.0 — Oct 5, 11:52 UTC by European-Mediterranean Seismological Centre

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.

What USGS has published since this earthquake

Aftershock forecast

USGS gives less than a 1% chance of at least one aftershock of magnitude 5 or larger in the week to 26 Oct 2026, less than a 1% chance of magnitude 6 or larger, and less than a 1% chance of magnitude 7 or larger.

USGS puts less than a 1% chance on an earthquake larger than this magnitude 5 following in the week to 26 Oct 2026.

USGS forecast issued 19 Oct 2026 10:52 UTC, generated automatically. A forecast gives chances, not times: it cannot say when or where an aftershock will strike.

From the U.S. Geological Survey. The USGS event page has the maps and everything USGS has published for this earthquake.

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.