Movers, shakers of shale: Seismic testing adapts to Western Pa.

November 25, 2013

Three white trucks roll head-to-tail along Route 30 at about 1 mile per hour. Every 250 feet, they stop and slowly lower wood and metal pads to the road.

Then they shake. Some in the gas industry call this "getting elephants to jump at the same time."

These are seismic testing trucks, sending vibrations 20,000 feet deep to get a picture of the Marcellus shale just as a sonogram pictures an unborn baby. And it's the first step for gas companies after they commit to drilling a new region.

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