M3.6 earthquake 6 km SSE of Byron, Oklahoma

A magnitude 3.6 earthquake struck 6 km SSE of Byron, Oklahoma on Wed, Aug 19, 2015, 7:47 PM CDT (00:47 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.8 4 km NW of Nescatunga, 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.

38 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 us100033jm. Read Tue, Sep 22, 2026, 12:26 PM UTC.