M3.4 earthquake 9 km NNW of Arcadia, Oklahoma

A magnitude 3.4 earthquake struck 9 km NNW of Arcadia, Oklahoma on Sat, Jun 20, 2015, 6:21 AM CDT (11:21 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.5 4 km SW of Stillwater, 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.

69 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 us10002kh9. Read Wed, Sep 23, 2026, 5:41 AM UTC.