M3.5 earthquake 12 km W of Jefferson, Oklahoma

A magnitude 3.5 earthquake struck 12 km W of Jefferson, Oklahoma on Sat, Oct 10, 2015, 10:20 AM CDT (15:20 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.7 5 km SW of Lambert, Oklahoma. This one was a foreshock.

Map

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

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

12 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

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

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event us10003mpd. Read Tue, Sep 22, 2026, 3:32 AM UTC.