Start Date: End Date: Published Date Data Date
Young and Old Tibesti Volcanoes
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Published March 3, 2007
Two nearby volcanoes in the Tibesti Range Mountains in northern Chad exhibit dramatically different surface characteristics in a topographic image.
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Santa Maria Volcano, Guatemala
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Published February 4, 2007
Intermittently active, the Santa Maria Volcano released a plume in mid-January 2007.
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Lena River Delta, Russia
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Published January 25, 2007
The Lena River fractures into myriad streams that fan out across the tundra and empty into the Arctic Ocean. During the short summer, it thaws into a wetland of tremendous ecological importance.
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Karymsky Volcano on Kamchatka
Published January 14, 2007
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Ayles Ice Shelf, Ellesmere Island
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Published January 13, 2007
On August 13, 2005, the Ayles Ice Shelf on Ellesmere Island in northern Canada broke away from the island and floated out to sea. According to news reports, the break took less than an hour, and Luke Copland, director of the University of Ottawa’s Laboratory for Cryospheric Research, described the break as evidence of the Arctic’s rapid response to warming temperatures. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite observed the area before and after the ice shelf breakup.
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