- Associated Press - Monday, September 22, 2014

CHEYENNE, Wyo. (AP) — State geologists say more study is needed to determine if oil development could be causing small earthquakes outside a tiny town in south-central Wyoming.

Some geologists theorize the oil and gas industry is causing hundreds of mostly minor quakes in states including Oklahoma and Colorado. A Wyoming State Geological Survey report released Monday looks at whether anything similar is happening in Wyoming.

The survey found no significant correlation between earthquakes and wells the petroleum industry uses to inject water or gas underground, with one exception. A dozen small quakes have occurred in and near two oil fields outside Bairoil over the past 30 years.

State Geologist Tom Drean says the area is naturally prone to earthquakes and more study is needed to determine whether oil development plays a role.

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