M3.3 earthquake 10 km WSW of Shamrock, Oklahoma

A magnitude 3.3 earthquake struck 10 km WSW of Shamrock, Oklahoma on Tue, Oct 4, 2016, 8:10 AM CDT (13:10 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M5.0 3 km W of Cushing, Oklahoma. This one was a foreshock.

Map

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

The USGS’s account of the effects of this earthquake.

Felt (IV) at Stroud. Also felt at Claremore, Cushing, Drumright, Owasso, Sapulpa and Wellston.

From the USGS event page for us10006uy6. U.S. Geological Survey text and figures are in the public domain.

12 people reported to the USGS what they felt; the strongest reported shaking was IV, light 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: 162 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of 162.

From the USGS Earthquake Hazards Program and its partner networks, event us10006uy6. Read Thu, Oct 1, 2026, 8:23 PM UTC.