Everything you need to know about super volcanoes

Everything you need to know about super volcanoes for your GCSE : ) by Lara, Tattie, Kate, Emma, Clara, Kezia , Lottie and Jess

What is a supervolcano? By Lara When was the last eruption? 74 000 years ago Named examples of supervolcanoes? yellowstone volcano How do we know they exist? -

How does a super volcano erupt? 1. Supervolcanoes can occur when magma in the mantle rises into the crust from a hotspot but is unable to break through the crust, and pressure builds in a large and growing magma pool until the crust is unable to contain the pressure (this is the case for the Yellowstone Caldera)

How does a supervolcano compare to a normal volcano? … its worse CHARACTERISTICS Normal Volcano Super volcano Shape Cone-like mountain –especially if it is a composite volcano. NOT A MOUNTAIN Large depression called a caldera Size Etna is 3 km high and 140 km in its circumference. Yellowstone National Park is close to 100 km long, 40 km wide and 8 km deep. Scale of emissions VEI 5 Ash can travel a long way, lava travels shorter distances. VEI 8 Impact Over a few km Mostly local Ash travels over hundreds km 2 Will effect the whole world if erupts

What are the effects of a supervolcano? On the country in which it erupts, for example yellowstone, three quarters of the USA would be affected within a 1000 km radius, 90% of people are likely to be killed The ash generated will choke both people and animals buildings and roofs will collapse due to weight of the ash -it only needs 30 cm of ash to make a roof collapse. road transport would be very difficult ash would smother crops and vegetation - food supplies would stop. economic activity would be severely affected

The effects of a Supervolcanic Eruption-katys the globe cools drastically as the ash blocks out the sun crops don't grow for 6 years so disaster and the gas is also toxic so everything in it dies slowly from the inside outwards ash spreads everywhere with the wind and people die from it and can choke also the land is destroyed and fires start as well

What are the effects of a supervolcano? After 3 to 4 day the as would reach the UK and Europe The sulphur ejected into the atmosphere would rapidly spread across the globe It would result in major climatic cooling it would take 2 to 3 weeks for the sulphuric acid to spread across the annual average temperatures would drop by 10 degrees In Europe snow could fall for 3 years and remain on the ground colder temperatures could last for 6 to 10 years there would be a great loss in life, loss in the economy and changes to the ecosystems MENTION THE MONSOON RAINS as an example too globe

Emma’s Quiz Q 1 Supervolcanoes form at _____ margins or o