M3.3 earthquake 9 km S of Byron, Oklahoma

A magnitude 3.3 earthquake struck 9 km S of Byron, Oklahoma on Mon, Nov 23, 2015, 6:54 PM CST (00:54 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M3.7 7 km NNE of Nash, 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.

5 people reported to the USGS what they felt; the strongest reported shaking was III, weak 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 us100040lf. Read Tue, Sep 22, 2026, 4:36 AM UTC.