M3.9 earthquake Oklahoma

A magnitude 3.9 earthquake struck in Oklahoma on Thu, Mar 12, 2015, 3:34 PM CDT (20:34 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.1 7 km WSW of Langston, 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.

18 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

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 us10001lyg. Read Tue, Sep 22, 2026, 7:36 PM UTC.