M3.4 earthquake Oklahoma

A magnitude 3.4 earthquake struck in Oklahoma on Mon, Jul 20, 2015, 3:50 PM CDT (20:50 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.5 10 km SSW of Lucien, Oklahoma. This one was a foreshock.

Map

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

3 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: 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 us20002yqi. Read Wed, Sep 23, 2026, 7:50 AM UTC.