Helpful Guide for Marcellus Landowners on Seismic Testing for Natural Gas

Seismic testing to create a map of underground geology almost always precedes gas drilling. Seismic testing has been, and continues to be, very active in Centre County, PA, appropriately named being located smack in the middle of the state. Seismic testing usually involves large trucks thumping the ground to produce vibrations picked up by computers that use the sound waves to create 2D and 3D maps of what lies beneath. Sometimes helicopters are used, and sometimes holes are drilled and small explosive charges are ignited to create sound waves.

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