M1.5 earthquake 22 km S of Morton, Washington

A magnitude 1.5 earthquake struck 22 km S of Morton, Washington on Sat, May 18, 1985, 2:05 PM PDT (21:05 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M2.7 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: 198 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 198.

From the USGS Earthquake Hazards Program and its partner networks, event uw10190013. Read Tue, Sep 22, 2026, 9:53 AM UTC.