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Why does a volcano erupt?

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Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup). It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it. read more

Volcanoes are just a natural way that the Earth and other planets have of cooling off and releasing internal heat and pressure. Volcanoes erupt because of density and pressure. read more

Typical volcanic hazards. Lava is often thought to be the main danger of a volcanic eruption, but this is not the case. Numerous hazards result from eruptions and they can have a range of consequences. The most dangerous are the pyroclastic clouds, which destroy anything in their path. read more

The volcano will erupt for long periods forcing lava up and over the top of the volcano that, over time, construct massive mountains. Yellowstone and Mammoth are a type of super volcano and erupt with great force on the order of 100’s of thousands and millions of years. read more

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