After maintaining a low simmer for 10 months, NASA’s EO-1 satellite finally caught Italy’s Etna volcano erupting on Feb. 19 and 20, 2013, with three outbursts in 36 hours.
According to the Italian Istituto Nazionale di Geofisica e Vulcanologia, each outburst (paroxysm) featured “emission of lava flows, pyroclastic flows, lahars and an ash cloud.” The Advanced Land Imager (ALI) on the Earth Observing-1 (EO-1) satellite captured Mount Etna on Feb. 19, 2013, about three hours after the end of the first paroxysm. The false-color image combines shortwave infrared, near-infrared, and green light in the red, green, and blue channels of an RGB picture. This combination makes it easier to differentiate between fresh lava, snow, clouds and forest.
Image courtesy of NASA.