Oklahoma Rocked By 7 Earthquakes In 2 Days

By CNN

Published 07/14 2014 12:23PM

Updated 07/14 2014 12:24PM

Image Courtesy MGN Online

An unsettling weekend in Oklahoma. Seven earthquakes recorded in two days.

The largest registered a magnitude of 4.3 near Langston.

According to the U.S. Geological Survey, as of last month 207 quakes were reported in Oklahoma.

The state averaged just two per year from 1978 to 2008.

No official reason for the spike, but many environmentalists suggest the cause could be hydro-fracking -- the process of injecting a mixture of water and chemicals deep into the earth.

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