how does volcanic eruption occurs
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Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts. ... Runny magma erupts through openings or vents in the earth's crust before flowing onto its surface as lava. If magma is thick, gas bubbles cannot easily escape and pressure builds up as the magma rises.
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A volcanic eruption occurs when hot materials from the Earth's interior are thrown out of a volcano. Lava, rocks, dust, and gas compounds are some of these substance which come out. Eruptions can come from side branches or from the top of the volcano.
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