M3.7

USGS earthquake · M3.720 km E of Castle Rock, Washington

Name: M3.7 earthquake at 20 km E of Castle Rock, Washington
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

🇺🇸 - United States

Sep 5, 2026, 11:09 AM UTC · 21 hours ago

Map centered on the earthquake at 20 km E of Castle Rock, Washington, with a marker at its epicenter

Open in Apple Maps ↗

Shaking intensity

Strongest contour: Light (IV). Modelled by USGS ShakeMap; contours show where shaking was expected to reach each level, not damage.

Depth17.6 km

Origin timeSep 5, 2026, 11:09 AM UTC

Coordinates46.247, -122.644

Tsunami flagNot reported

Estimated shakingLight (IV)Modelled by USGS ShakeMap

Reported shakingLight (IV)From 985 public reports

Magnitude scaleLocal magnitude

SolutionReviewed by a seismologist

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 · M3.720 km E of Castle Rock, Washington

U.S. Geological Survey

More earthquakes