Mount Sinabung is a stratovolcano located in Indonesia. In late 2013, a lava dome formed on the summit. In early January 2014, the volcano erupted, and it erupted again in early February. Tall ash columns deposited material over a wide area; pyroclastic flows rumbled down the volcano's slopes, engulfing villages and resulting in fatalities.
On February 10, 2014, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra spacecraft captured an image of Sinabung: the top image depicts vegetation in red; an ash plume is light gray streaming eastward from the summit; light-colored areas on the southeast flank are pyroclastic and ash deposits. The bottom image is a composite of ASTER thermal infrared bands: the plume is in purple, indicating that its composition is mostly ash; the white triangular area is hotter than the surrounding materials; blue streaks are water clouds. The images cover an area of 10.3 by 19.6 miles (16.5 by 31.5 kilometers), and are centered at 3.2 degrees north, 98.4 degrees east.
Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team
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