JULY 2014

Beneath the Yellowstone Caldera, the geothermal system exploded from pressure from below. A magma pool twenty miles by forty miles blew into the sky, greater than the supervolcano in Indonesia that, 75,000 years ago, had killed fifty percent of the human race. More than 250 cubic miles of magma erupted into the air. For hundreds of miles everything burned, and ash choked the air. Burning, suffocating night spread over the land.

The explosion triggered earthquakes in the San Andreas Fault and on into the Pacific Rim. As convergent tectonic plate boundaries lifted or subducted, more tsunamis were generated in the Pacific, and then in the Indian Ocean. Even deep sea life was affected as thermal vents opened—but not affected very much. Most of the ocean life was hardy, adapted, and innocent.

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