RE - Yellowstone Flashcards
How much material do normal supervolcanoes?
At least 1000km3
Where do supervolcanoes appear?
At large depressions called calderas
When was the last supervolcano?
74,000 years ago in Toba (Indonesia)
What were the effects of the last supervolcanoes?
- World temp decreased by 3-5 degrees
- 3000km3 of magma produced
- 15cm of ash fell
What has happened to the Norris Geyser at the yellowstone today?
It has risen up to 70cm in places
What is the size of thhe magma chamber beneath yellowstone?
It is believed to be 80km long, 40km wide and 8km deep
How much material could a yellowstone eruption produce in the future? and how much land would be destroyed?
- 5000km3 of material
- 10,000km3
How many people would instantly die from a yellowstone eruption? and what from?
87,000 people - 15cm thick of ash would kill 1 in 3 people within a 1000km radius (it would have a catastrophic effect)
How long would it take for the yellowstone eruption to reach UK?
5 days
What would happen to the global temperature in a yellowstone eruption?
It would drop by 5 degrees which would mean crop would fail causing a widespread famine
What else would the ash affect?
Transport, electricity, water and farming - lahars (mud flows) are a probability
