What is the largest volcano in the United States is it still active?
What is the largest volcano in the United States is it still active? Yellowstone CalderaLocationYellowstone National Park, Wyoming, United StatesParent rangeRocky MountainsTopo mapUSGS Yellowstone National ParkGeology How many US states have active volcanoes? Twelve states in the U.S. have active volcanoes, according to the U.S. Geological Survey's data. What is the longest active volcano? Lava has been spilling out of Puu Oo crater since 1983, making Kilauea the world's longest continuously erupting volcano. Kilauea is also the youngest of Hawaii's aboveground volcanoes, which have formed over the course of the past 5 million years as the Pacific plate drifts over...