M3.5 earthquake 10 km WSW of Shamrock, Oklahoma

A magnitude 3.5 earthquake struck 10 km WSW of Shamrock, Oklahoma on Fri, Jul 14, 2017, 9:04 AM CDT (14:04 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.2 6 km ENE of Edmond, 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.

13 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: 90 in the 60 days after this one and 40 in the 30 days before it.

The first 60 of 90.

From the USGS Earthquake Hazards Program and its partner networks, event us20009wbh. Read Tue, Sep 29, 2026, 6:55 PM UTC.