(Photo : NASA/JPL-Caltech/University of Michigan) The Four Corners area (red) is the major U.S. hotspot for methane emissions in this map. Dark colors are lower than average; lighter colors are higher.
A methane hotspot detected over at Four Corners region located in Colorado, Utah, Arizona and New Mexico in southwest U.S. has remained a mystery after it was first spotted by a European Space Agency satellite.
Also read: Boom! Orbiter spies crash site on Mars