According to the Unites States Energy Information Administration (EIA), the Appalachian basin and particularly the Utica and Marcellus natural shale gas plays in Ohio, Pennsylvania, and West Virginia have significantly increased their gross output in the last decade. Their combined gas production rose from 1.4 bcf/d in 2008 (nearly 40 mcm/d or 14.4 bcm/year) up to 24 bcf/d in 2017 (678 mcm/d or 247 bcm/year), rising their share in the US total natural gas production from 2% in 2008 to 27% in October 2017.
Besides, the use of natural gas for power generation in these three states has increased from 0.5 bcf/d (5.2 bcm/year) in 2008 up to 1.9 bcf/d (19.6 bcm/year) in 2017. This steady production rise has been able to meet the demand in the three states and even in the neighbouring states with the modification of the pipeline network. The Appalachian production has been displacing gas supply from the Gulf Coast, freeing additional US production for export by pipelines and as LNG.