Pathways and Environmental Impacts of Methane Migration: Case Studies in the Marcellus Shale, USA

Figure 7

Time series plot of dissolved methane concentrations at the Sugar Run (Bradford) site with gas drilling and HVHF dates (dashed grey lines), gas well remedial activities, onset of impacts to water wells 1–6, and bubbling in the Susquehanna River (modified from [13], adding last date bubbling was observed in Susquehanna River).