U.S. revises amount of Marcellus gas higher, much higher (42 times higher)

Philly.com: U.S. revises amount of Marcellus gas higher, much higher

The U.S. Geological Survey on Tuesday dramatically increased its estimate of the natural gas contained in the Marcellus Shale, the deep deposit that has triggered a drilling frenzy in Pennsylvania.

The USGS now estimates that the shale contains about 84 trillion cubic feet of undiscovered, technically recoverable natural gas and 3.4 billion barrels of undiscovered, technically recoverable natural gas liquids.

The agency's latest numbers are 42 times greater than its 2002 assessment, which said the shale contained about two trillion cubic feet of gas. The Marcellus lies under Pennsylvania and seven other Appalachian states. …