M2.4 earthquake 20 km WNW of Klamath Falls, Oregon

A magnitude 2.4 earthquake struck 20 km WNW of Klamath Falls, Oregon on Tue, Sep 21, 1993, 5:20 AM PDT (12:20 UTC), 7 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
2.4	Md, duration	Pacific Northwest Seismic Network	Preferred · Final · ±0.08 · 3 stations
2.6	Md, duration	USGS National Earthquake Information Center	Reviewed

The USGS’s account of the effects of this earthquake.

Held to mainshock location.

From the USGS event page for uw10314123. U.S. Geological Survey text and figures are in the public domain.

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: 147 in the 60 days after this one and 65 in the 30 days before it.

The first 60 of 147.

From the USGS Earthquake Hazards Program and its partner networks, event uw10314123 (also filed as usp00060sd). Read Sat, Oct 3, 2026, 12:59 PM UTC.