Super volcano

•  supervolcano - a mega colossal volcano that erupts at least 1000km3 of debry
• An erruption could be 100 - 150 times bigger than mount st helens in 1980
• They have a flat appreance, this is because they are a collapsed magma chamber  this depression in the ground this is a Caldera.

• Magma beneath yellow stone is shifting
• 
• increasing activity and the chamber rises by an  half an inch each year
• the chamber is believed to be 80km long 40km wide and 8km deep
• an eruption occured 2 million years ago, and 630 000 years ago which means we are due one

What to expect....

• A cloud of ash rising 20km would be formed
• It is predicted it would travel westward towards California
• would kill  1 in 3 people affected
• 87 000 would die
• buildings within 1,000 km would be covered in 15 cm of ash