Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
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On Aug. 12, 2011, Etna had its tenth paroxysm of the year, captured in this natural-color satellite image.

Throughout 2011, activity at Sicily’s ount Etna has been characterized by paroxysms: short, violent bursts of activity. Each event has included volcanic tremors, ash emissions and lava flows centered around the New Southeast Crater, just below the summit.

On Aug. 12, 2011, Etna had its tenth paroxysm of the year, captured in this natural-color satellite image. Etna spewed a thick white plume of gas and ash to the southeast, toward the nearby city of Catania. The ash cloud was produced by vigorous lava fountaining at the New Southeast Crater. The Toulouse Volcanic Ash Advisory Center estimated ash emissions reached an altitude of 14,000 feet (4,300 meters); 2,000 feet (600 meters) above the 10,925-foot (3,330-meter) summit. The image was captured at 11:40 a.m. local time by the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor aboard the Terra satellite.

NASA image courtesy Jeff Schmaltz MODIS Rapid Response Team, NASA-GSFC. Caption by Robert Simmon.

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