M2.3 earthquake 10 km ENE of Ashford, Washington

A magnitude 2.3 earthquake struck 10 km ENE of Ashford, Washington on Sun, Jul 28, 1991, 9:15 PM PDT (04:15 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.8 37 km NNE of Amboy, 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
2.3	Md, duration	Pacific Northwest Seismic Network	Preferred · Final · ±0.03 · 14 stations
2.3	Md, duration	USGS National Earthquake Information Center	Reviewed

The USGS’s account of the effects of this earthquake.

Felt at Mt. Rainier.

From the USGS event page for uw10282613. U.S. Geological Survey text and figures are in the public domain.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 15 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event uw10282613 (also filed as usp0004urd). Read Fri, Oct 2, 2026, 4:00 AM UTC.