New Iceland eruptions spotted from space on Sept. 5.
Credit: NASA Earth Observatory
LiveScience.com
written by Becky Oskin
Sunday September 7, 2014
Two new lava-spouting fissures opened overnight Thursday (Sept. 4) in Iceland, and NASA's Terra satellite spied the hotspots from space.
The lava erupted Sept. 5, just 1.2 miles (2 kilometers) north of Dyngjujokull glacier. Magma rose through cracks in the ground in a long depression called a rift valley. The valley appeared just a few days earlier, when the ground shifted to accommodate the fresh magma feeding the older Holuhraun eruption to the north.
The Terra satellite's MODIS instrument captured the eruption at 12:50 p.m. local time (8:50 a.m. ET) on Friday (Sept. 5). The red outline highlights unusually high surface temperatures associated with volcanic activity.
Iceland's Civil Protection Agency has restricted travel near the glacier for fear of flooding. Iceland has a long history of spectacular glacial floods triggered when volcanoes erupt underneath or next to glaciers, and Dyngjujokull glacier is already feeling the heat. On Sept. 3, an inspection flight spotted a half-mile-wide (1 km) pit in the glacier's surface. The circular depression could signal melting from geothermal activity or a small subglacial eruption. If the new lava flow reaches the glacier, it could also trigger an explosive burst of ash. [Gallery: Beautiful Images of Bardarbunga's Volcanic Eruption]
Vigorous activity still continues at the surface eruption that began Aug. 28, when lava broke through a fissure in the 200-year-old Holuhraun lava field between Bardarbunga volcano and Askja volcano. Sputtering lava built small cones, and fiery fountains shot up to 328 feet (100 m) in the air. A plume of steam and sulfuric gas reached 15,000 feet (4,500 m) high, the Icelandic Met Office said.
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