Yellowstone's Supervolcano: The Park Built on a Sleeping Giant

America's National Parks, One at a Time · Sep 23, 2026 · 4m

Yellowstone became America's first national park in 1872, sitting atop one of the largest active volcanic systems on Earth. We cover the scale of its past eruptions, why the caldera floor rises and falls, and the real (very low) odds of another supereruption -- plus why the park has more than half the world's geysers.

This episode was written and voiced with AI tools and reviewed by a human editor.

This episode includes AI-generated content.