M2.8 earthquake 23 km SSW of Chiloquin, Oregon

A magnitude 2.8 earthquake struck 23 km SSW of Chiloquin, Oregon on Mon, Sep 20, 1993, 11:13 PM PDT (06:13 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M4.3 25 km SW of Chiloquin, 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: 185 in the 60 days after this one and 14 in the 30 days before it.

The first 60 of 185.

From the USGS Earthquake Hazards Program and its partner networks, event uw10313853 (also filed as usp00060r5). Read Tue, Sep 22, 2026, 4:21 PM UTC.