At local scales emissions of methane (CH4) and carbon dioxide (CO2) are highly uncertain. The AVIRIS-NG imaging spectrometer maps large regions and generates high spatial resolution CH4 and CO2 concentration maps from anthropogenic and natural sources. This is an example of a CH4 plume from a tank obtained using a ground-based thermal camera. At this location, a plume was first observed using real time detection and geolocation with AVIRIS-NG, which permits unambiguous identification of individual emission source locations and communication to a ground team for rapid followup. A number of methane emission sources first observed with AVIRIS-NG were subsequently verified using a thermal camera, including this example.