Definitions for "Supervolcano"
a eruption which is thousands of times more massive than a normal eruption
an eruption which is thousands of times more
A supervolcano is an enormous volcano that is an order of magnitude larger than ordinary volcanoes. A supervolcano occurs when a huge magma chamber in the Earth's crust erupts after being under great pressure, causing a large caldera to form as the land over the magma chamber collaspses. This type of eruption is probably able to cause a major climate change and a mass extinction as it ejects dust, debris, and caustic gases into the atmosphere. Supervolcanos do not look like the familiar cone-shaped volcano - a supervolcano looks like a huge collapsed crater. Yellowstone National Park (in Wyoming and Montana, USA) is a supervolcano70 km long and 30 km wide; it is due to erupt soon (in terms of geological time).