M2.3 earthquake 38 km S of Morton, Washington

A magnitude 2.3 earthquake struck 38 km S of Morton, Washington on Wed, Mar 28, 1984, 7:43 PM PST (03:43 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.3 12 km WSW of La Grande, 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: 91 in the 60 days after this one and 153 in the 30 days before it.

The first 60 of 91.

From the USGS Earthquake Hazards Program and its partner networks, event uw10180878. Read Fri, Oct 2, 2026, 10:01 AM UTC.