what are the characteristics of a supervolcano
A supervolcano is a volcano on a massive scale. It is different from a volcano because: 1  it erupts at least 1,000 km 3 of material (a large volcano erupts around 1 km 3). 2  it forms a depression, called a caldera [caldera: A cauldron / depression shaped tectonic feature usually formed from the collapse of a magma chamber.] ( 3 a volcano forms a cone shape). it erupts at least 1,000 km 3 of material (a large volcano erupts around 1 km 3). 2  it forms a depression, called a caldera [caldera: A cauldron / depression shaped tectonic feature usually formed from the collapse of a magma chamber.