Supervolcanoes (Yellowstone)

Question 1

What would be local effects of an eruption?

Answer 1

Within 1000km, 90% of the population could be killed
Deadly toxins within the ash would be fatal over time
Kill and sicken humans/animals
25 mile high ash cloud
1 in 3 affected would die
Crops would not grow, people would starve

Question 2

What would be global effects of an erruption?

Answer 2

Ash in the atmosphere could lower global temp by 20c
Society would not survive
Monsoon rains in sia would fail causing mass starvation in India, China, and many other countries
Europe could be up to 5c cooler
Possible mini ice age