M3.4

USGS earthquake · M3.49 km SW of Brentwood, CA

Name: M3.4 earthquake at 9 km SW of Brentwood, CA
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

🇺🇸 - United States

Sep 12, 2026, 7:25 AM UTC · 47 days ago

Map centered on the earthquake at 9 km SW of Brentwood, CA, with a marker at its epicenter

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Depth17.9 km

Origin timeSep 12, 2026, 7:25 AM UTC

Coordinates37.873, -121.800

Tsunami flagNot reported

Reported shakingWeak (III)From 251 public reports

Magnitude scaleLocal magnitude

SolutionReviewed by a seismologist

Who felt it

Nearby places

Blackhawk, California9 km ENE of the epicentre
Brentwood, California11 km SW of the epicentre
Diablo, California12 km ENE of the epicentre
Clayton, California13 km SE of the epicentre

Places listed by USGS. Distances are to the epicentre.

Official source

U.S. Geological Survey

Terremoto preserves this event snapshot for a stable public link. USGS remains the authoritative source for revisions and scientific details. Shaking contours and population estimates come from USGS ShakeMap and PAGER, which revise them as more data arrives.

View the USGS record ↗

USGS earthquake · M3.49 km SW of Brentwood, CA

Nearby places

U.S. Geological Survey

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