What is the most explosive type of volcanic eruptions?
According to the Volcanic Explosivity Index, the strongest types of volcanic eruptions are Plinian/Ultra-Plinian. Some of the notable examples in that category include Lake Toba, Tambora and Krakatoa.
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In which major European city, there is a volcano that may soon erupt?
On May 8, 1902, Ascension Day, all inhabitants of Saint-Pierre, the major city in Martinique, have died. Only two survived. What happened?
What is the typical source of pressure buildup inside a volcano?
centrifugal force of Earth rotation
boiling of rainwater
degassing of magma