M3.7 earthquake 21 km SSW of Chiloquin, Oregon

A magnitude 3.7 earthquake struck 21 km SSW of Chiloquin, Oregon on Mon, Sep 20, 1993, 9:04 PM PDT (04:04 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.8 21 km WNW of Klamath Falls, Oregon. 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 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event usp00060qm. Read Tue, Sep 22, 2026, 5:23 PM UTC.