M2.6 earthquake 4 km N of Helena, Oklahoma

A magnitude 2.6 earthquake struck 4 km N of Helena, Oklahoma on Wed, Dec 9, 2015, 12:03 AM CST (06:03 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.7 4 km N of Cherokee, Oklahoma. This one was a foreshock.

Map

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

No one has reported feeling this quake to the USGS.

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 us20004fr1. Read Wed, Sep 23, 2026, 5:06 AM UTC.