M1.9 earthquake 38 km NNE of Amboy, Washington

A magnitude 1.9 earthquake struck 38 km NNE of Amboy, Washington on Sat, Oct 4, 1986, 5:52 PM PDT (00:52 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.5 17 km ESE of Toledo, 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: 181 in the 60 days after this one and 13 in the 30 days before it.

The first 60 of 181.

From the USGS Earthquake Hazards Program and its partner networks, event uw10213528. Read Sat, Oct 3, 2026, 7:46 PM UTC.