Minor Earthquake ● Closed

M4.8 Earthquake — 97 km W of Petrolia, CA

Event time: Last updated: Oct 9, 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 4.8 earthquake 97 km W of Petrolia, CA at a depth of 10.0 km, recorded by the U.S. Geological Survey.

Measurements

MagnitudeM4.8
Depth10.0 km
Coordinates40.4225, -125.4183
Region97 km W of Petrolia, CA
Felt Reports20
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

Also reported by: EMSC

This event as JSON · API and licence

Source updated 19 days ago (Sep 30, 2026 05:56 UTC) · we last heard from US Geological Survey 18 seconds ago

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What has changed

  • Magnitude revised from M4.3 to M4.7 — Sep 29, 11:51 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

Active Fire Zone — 29 satellite detections (24h) Moderate Wildfire active via FIRMS 6 hr ago Active Fire Zone — 27 satellite detections (24h) Moderate Wildfire active via FIRMS 1 day ago Active Fire Zone — 27 satellite detections (24h) Moderate Wildfire active via FIRMS 1 day ago Active Fire Zone — 26 satellite detections (24h) Moderate Wildfire active via FIRMS 1 day ago M2.6 Earthquake — 18 km WSW of Petrolia, CA Minor Earthquake monitoring via USGS 2 days 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.