when was the last time yellowstone park erupted
Yellowstone Caldera Non-explosive eruptions of lava and less-violent explosive eruptions have occurred in and near the Yellowstone caldera since the last supereruption.[13][14] The most recent lava flow occurred about 70,000 years ago, while a violent eruption excavated the West Thumb of Lake Yellowstone around 150,000 years ago. Smaller steam explosions occur as well: an explosion 13,800 years ago left a 5 km (3.1 mi) diameter crater at Mary Bay on the edge of Yellowstone Lake (located in the center of the caldera).[15][3] Currently, volcanic activity is exhibited via numerous geothermal vents scattered throughout the region, including the famous Old Faithful Geyser, plus recorded ground-swelling indicating ongoing inflation of the underlying magma chamber.
Yellowstone National Park Yellowstone National Park is an American national park located in Wyoming, Montana, and Idaho. It was established by the U.S.Â Congress and signed into law by President Ulysses S. Grant on March 1, 1872.[4][5] Yellowstone was the first national park in the U.S. and is also widely held to be the first national park in the world.[6] The park is known for its wildlife and its many geothermal features, especially Old Faithful geyser, one of its most popular features.[7] It has many types of ecosystems, but the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion.