Facts about super volcanoes.

• A super volcanic eruption occurs somewhere in the world approximately every 50,000 years or so.
• The last super volcanic eruption happened around 74,000 years ago in Indonesia so we are probably overdue for one.
• Yellowstone has experienced three super volcanic eruptions in the past 2.1 million years, they were 2.1 million years ago, 1.3 million years ago and 640,000 years ago. Disturbingly, this cycle of approximately 600-700,000 years suggests another eruption could be brewing.
•  A super eruption at Yellowstone would eject over 2,000 million tonnes of sulfuric acid into the stratosphere.
  This would form a veil around the earth that deflects sunlight, triggering a catastrophic volcanic winter.
  Temperatures would drop by up to 12 degrees in the northern hemisphere and up to 16 degrees in the southern hemisphere.