Oregon earthquakes

M6.0 earthquake 27 km WNW of Klamath Falls, Oregon

A magnitude 6.0 earthquake struck 27 km WNW of Klamath Falls, Oregon on Mon, Sep 20, 1993, 10:45 PM PDT (05:45 UTC), 9 km (5 mi) below the surface.

Klamath Falls forecast More in Oregon

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 6.0 (md), strong
Local time: Mon, Sep 20, 1993, 10:45 PM PDT
UTC: 1993-09-21 05:45:35 UTC
Depth: 8.5 km (5.3 mi), shallow
Epicenter: 42.358° N, 122.058° W
Region: Oregon
Strongest shaking: VII, very strong shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VII, very strong shaking
Peak ground acceleration: 51.6% of gravity
Peak ground velocity: 4.1 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Moment magnitude: 6.0 Mw
Landslide alert: Yellow
Liquefaction alert: Yellow

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.4 km horizontally, 0.8 km in depth
Magnitude uncertainty: ±0.02
Depth from: From location
Station coverage gap: 128°
Stations used: 234

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 98 in the 60 days after this one and 20 in the 30 days before it.

After

The first 60 of 98.

Before

Earthquakes today Oregon earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10313838 (also filed as gcmtb092193b, usp00060r3, nc30029039, ci3123135, gcmt19930921054534, iscgem209133, atlas19930921054533). Read Tue, Sep 22, 2026, 10:00 AM UTC.