Understanding Volcanicity

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Volcanicity

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Processes related to volcanoes

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Magma

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Molten rock beneath Earth's surface

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Lava

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Molten rock on Earth's surface

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Volcano

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Opening in Earth's crust

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Eruption

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Release of magma, ash, gases

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Crater

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Bowl-shaped volcanic depression

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Magma Chamber

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Reservoir of magma beneath volcano

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Vent

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Channel for magma to surface

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Ash Cloud

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Volcanic ash in atmosphere

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Lahar

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Volcanic mudflow