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Katla volcano
Katla () is a large volcano in southern Iceland. It is very active; twenty eruptions have been documented between 930 and 1918, at intervals of 13–95 years. It has not erupted violently for years, although there may have been small eruptions that did not break the ice cover, including ones in 1955,〔 1999,〔(【引用サイトリンク】title=1999 Eruption, ''jökulhlaup'' )〕 and 2011.〔
Prior eruptions have had a Volcanic Explosivity Index (VEI) of between 4 and 6 on a scale of 0 to 8. In comparison, the Eyjafjallajökull 2010 eruption had a VEI-4. The bigger VEI-6 eruptions are comparable to Mount Pinatubo's 1991 eruption.
==Geography and features==
Katla is one of the largest volcanoes in Iceland. It is situated to the north of Vík í Mýrdal and to the east of the smaller glacier Eyjafjallajökull. Its peak reaches and is partially covered by the Mýrdalsjökull glacier. The system has an area of . The Eldgjá canyon is part of the same volcanic system.
The caldera of the Katla volcano has a diameter of and is covered with of ice. The volcano normally erupts every 40–80 years. The flood discharge at the peak of an eruption in 1755 has been estimated at 200,000–400,000 m3/s (7.1-14.1 million cu ft/sec), comparable to the combined average discharge of the Amazon, Mississippi, Nile, and Yangtze rivers (about 266,000 m3/s (9.4 million cu ft/sec)).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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