M2.6 earthquake 21 km WNW of Klamath Falls, Oregon

A magnitude 2.6 earthquake struck 21 km WNW of Klamath Falls, Oregon on Tue, Sep 21, 1993, 2:41 AM PDT (09:41 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.1 23 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.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.6	Md, duration	Pacific Northwest Seismic Network	Preferred · Final · ±0.09 · 4 stations
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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: 157 in the 60 days after this one and 56 in the 30 days before it.

The first 60 of 157.

From the USGS Earthquake Hazards Program and its partner networks, event uw10314068 (also filed as usp00060s3). Read Thu, Oct 1, 2026, 9:06 PM UTC.