M3.5 earthquake 28 km WNW of Klamath Falls, Oregon

A magnitude 3.5 earthquake struck 28 km WNW of Klamath Falls, Oregon on Thu, Sep 23, 1993, 6:57 PM PDT (01:57 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.7 22 km NW 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: 88 in the 60 days after this one and 111 in the 30 days before it.

The first 60 of 88.

From the USGS Earthquake Hazards Program and its partner networks, event uw10315903 (also filed as usp00060ya). Read Tue, Sep 22, 2026, 12:12 PM UTC.