M2.9 earthquake 2 km ESE of Mount Vernon, Washington

A magnitude 2.9 earthquake struck 2 km ESE of Mount Vernon, Washington on Thu, Aug 21, 2025, 1:01 AM PDT (08:01 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.9 7 km ENE of Marrowstone, Washington. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.89	ML, local (Richter)	Pacific Northwest Seismic Network	Preferred · Final · ±0.1552319208689945 · 67 stations
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.037 · 96 stations

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

164 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 18 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event uw62174381 (also filed as us6000r2r6). Read Mon, Oct 5, 2026, 3:42 AM UTC.