Oklahoma Geological Survey

Oklahoma native and Los Angeles Times reporter Hailey Branson-Potts looks at the rise of earthquakes in Oklahoma, which has already had twice as many earthquakes this year as in 2013.

For the past three decades, Oklahoma averaged about 50 earthquakes a year. But that number has skyrocketed in the past few years. In 2013 — the state's most seismically active year ever — there were almost 3,000.

The quakes are small, and they're concentrated in the central part of the state, where the Erwins live.