M3.4 earthquake 3 km ESE of Quinton, Oklahoma

A magnitude 3.4 earthquake struck 3 km ESE of Quinton, Oklahoma on Sun, Aug 22, 2021, 8:02 AM CDT (13:02 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.7 1 km S of Quinton, 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.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 71 in the 60 days after this one and 48 in the 30 days before it.

The first 60 of 71.

From the USGS Earthquake Hazards Program and its partner networks, event ok2021qksb (also filed as us6000f9nh). Read Tue, Sep 22, 2026, 8:36 PM UTC.