Category Archives: Volcanoes

Volcanic Activity at Llaima, Chile

SERNAGEOMIN reported that although observations of Llaima were inhibited by cloud cover on 2 July, incandescence from the 1-km-long lava flow on the W flank was observed. An overflight revealed cooled blocks at the end of the lava flow and … Continue reading

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Volcanoes and Global Cooling

Volcanic eruptions are thought to be responsible for the global cooling that has been observed for a few years after a major eruption. The amount and global extent of the cooling depend on the force of the eruption and, possibly, … Continue reading

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Volcanoes Beneath the Polar Ice

Despite centuries of exploration, the oceans continue to yield many surprises. In the last few years, for example, scientists have found that a long ridge beneath the north polar ice cap is dotted with volcanoes, and with vents of superheated … Continue reading

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Distribution of Volcanic Activity

Volcanic activity is widespread over the earth, but tends to be concentrated in specific locations. Volcanoes are most likely to occur along the margins of tectonic plates, especially in subduction zones where oceanic plates dive under continental plates. As the … Continue reading

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