M2.8 earthquake 17 km NW of Klamath Falls, Oregon

A magnitude 2.8 earthquake struck 17 km NW of Klamath Falls, Oregon on Thu, Sep 23, 1993, 4:54 PM PDT (23:54 UTC), 1 km (0 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.

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
2.8	Md, duration	Pacific Northwest Seismic Network	Preferred · Final · ±0.03 · 2 stations
3.3	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: 89 in the 60 days after this one and 124 in the 30 days before it.

The first 60 of 89.

From the USGS Earthquake Hazards Program and its partner networks, event uw10315873 (also filed as usp00060y7). Read Thu, Oct 1, 2026, 10:46 AM UTC.