M2.9 earthquake 27 km NW of Klamath Falls, Oregon

A magnitude 2.9 earthquake struck 27 km NW of Klamath Falls, Oregon on Mon, Sep 20, 1993, 11:25 PM PDT (06:25 UTC), 8 km (5 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
2.9	Md, duration	Pacific Northwest Seismic Network	Preferred · Final · ±0.07 · 9 stations
3.5	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: 182 in the 60 days after this one and 29 in the 30 days before it.

The first 60 of 182.

From the USGS Earthquake Hazards Program and its partner networks, event uw10313868 (also filed as usp00060r8). Read Fri, Oct 2, 2026, 1:44 AM UTC.