Lobby > Exhibits > Why Geysers Erupt > Underlying Geology

VOLCANOES

It may not seem obvious at first glance, but Yellowstone is an active volcano. Surface features such as geysers and hot springs are direct results of the region’s underlying volcanism. Explore the following links to find out how the “Structure of the Earth” contributes to “Yellowstone’s Hot Water Taps.”

1. Structure of the Earth 2. Exploring the Hotspot 3. Yellowstone Fireworks 4. Branded by a Volcano

5. Volcano Comparisons 6. Another Eruption? 7. Clues to Look for 8. Yellowstone's Hot Water Taps