M3.4 earthquake 4 km ESE of Helena, Oklahoma

A magnitude 3.4 earthquake struck 4 km ESE of Helena, Oklahoma on Thu, Feb 5, 2015, 1:06 AM CST (07:06 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.0 11 km ENE of Nescatunga, 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.

9 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 usc000tlva. Read Tue, Sep 22, 2026, 12:15 PM UTC.