Volcanic Regions Yellowstone Supervolcano & Hydrothermal System Explained Yellowstone is one of Earth’s largest active volcanic and hydrothermal systems. Beneath its forests, lakes, geyser basins and broad plateaus lies a complex network of partially molten rock, hot crystalline mush, faults, groundwater, steam and volcanic gases. Yellowstone is commonly called a “supervolcano” because several enormous explosive … Continue reading Yellowstone Supervolcano and Hydrothermal System Explained: Magma, Geysers, Earthquakes, and Real Risk