A supervolcano is a volcano that can make a volcanic eruption where the things being thrown out of the volcano have a volume bigger than . This is thousands of times bigger than most volcanic eruptions which happened a long time. Supervolcanoes can occur when magma in the Earth rises into the crust from a hotspot, but can not break through the crust. More and more pressure builds up in a large and growing magma pool until the crust can no longer take the pressure.