what will happen if one of them erupts
if a super volcano erupts
the lava will wipe out everything for 100 km around the volcano
50 cm of ash will fall in an hour
the dust and gas will block out the sun for a long time
the temperature will drop
plants and animals will die
many people won't survive
calderas or super volcanoes are huge volcanoes that can cause worldwide
damage and climate change if they erupt. The good news is this only happens
every 100,000 years. The bad news is there are at least two sleeping
super volcanoes that are ready to wake soon - Toba, on the Indonesian
island of Smatra, and Yellowstone in the USA.