Locations of the CO2-rich and CH4-rich gas emissions archived in GOOGAS (yellow and blue triangles), CO2 Earth degassing map (color scale) from carbon mass balance of aquifers (Chiodini et al., 2004), and seismic activity in Italy (see http://legacy.ingv.it/CSI/), indicated by white dots. Two previously identified large structures, the Tuscan Roman Degassing Structure (TRDS) and the Campanian Degassing Structure (CDS), are also labeled. Background map of Italy provided by Google Maps.
