M2.2 earthquake 14 km N of Onalaska, Washington

A magnitude 2.2 earthquake struck 14 km N of Onalaska, Washington on Thu, Sep 23, 2004, 2:06 PM PDT (21:06 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.9 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.

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: 200 in the 60 days after this one and 10 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event uw10626933. Read Fri, Oct 2, 2026, 4:00 AM UTC.