Yellowstone super volcano

Question 1

background info

Answer 1

volcanic activity began 2 mill years ago when a giant caldera formed
during the largest eruptions ash was spread over much of the western half of NA, while gases carried around the globe -> likely to have caused a noticeable + temporary decrease in global temp

Question 2

do tectonic events face a regular pattern

Answer 2

no, it is impossible to predict

Question 3

is Yellowstone’s magma chamber growing

Answer 3

there is no evidence

Question 4

when did it last erupt

Answer 4

70,000 yrs ago

Question 5

what is a super volcano

Answer 5

A supervolcano is a volcano that has had an eruption with a Volcanic Explosivity Index (VEI) of 8, the largest recorded value on the index.

Question 6

what are the 3 main stages?

Answer 6

1. surge of magma -> magma trapped under Earths crust (hotspot)
2. supereruption -> build up of pressure, gives off 1000km3 of tephra
3. resurgence -> magma reservoir collapses + forms a caldera