America’s Most Powerful Volcanoes Are Still Active

Yellowstone and Mount St. Helens are two of the most closely watched volcanoes in the United States, but for very different reasons. One is an enormous volcanic system capable of producing massive eruptions over geologic timescales, while the other has demonstrated its destructive power in modern history. In this video, we compare these iconic volcanoes, explain how they work, and examine the potential consequences of their next major eruption.