<Ol> <Li> Vulcanian eruption </Li> <Li> Peléan eruption </Li> <Li> Plinian eruption </Li> <Li> Phreatomagmatic eruption and Phreatic eruption <Ol> <Li> Surtseyan eruption </Li> </Ol> </Li> </Ol> <Li> Phreatomagmatic eruption and Phreatic eruption <Ol> <Li> Surtseyan eruption </Li> </Ol> </Li> <Ol> <Li> Surtseyan eruption </Li> </Ol> <Ul> <Li> Consequences: <Ul> <Li> Eruption column </Li> <Li> Pyroclastic flow </Li> <Li> Pyroclastic fall </Li> <Li> Pyroclastic surge </Li> </Ul> </Li> </Ul>

An eruption begins when pressure on a large amount of