https://apnews.com/571dae549ffe4ddf9fd2d8dc1623a46b

OKLAHOMA CITY (AP) — Geologists say they may have found previously unmapped faults in Oklahoma that could be contributing to a sharp increase in induced earthquakes in the state.

The possible faults were found in a study by the U.S. Geological Survey and the Oklahoma Geological Survey that focused on areas around earthquakes of magnitude 5.0. Many of the earthquakes weren't on known faults.