The magma chamber is believed to be about 40 by 80 kilometers across, similar in size to the overlying Yellowstone caldera. The top of the chamber is about 8 km deep and the bottom is around 16 km deep.
How many caldera-forming eruptions have occurred from the long-lived hotspot that is currently beneath Yellowstone?
Many eruptive units found along the path of the Yellowstone hotspot have been dated, but only a few of them represent large caldera-forming eruptions. At least five volcanic fields centered on large caldera complexes have been identified.
How many giant eruptions have occurred in the Yellowstone National Park region and how large were they?
Volcanic activity began in the Yellowstone National Park region a little before about 2 million years ago.
Since the most recent giant caldera-forming eruption, 640,000 years ago, at least 30 smaller but still destructive volcanic eruptions have occurred at Yellowstone.
No. The volcanic system in Yellowstone National Park is displaying the same general types of restless activity today as it has since volcanic activity was first analyzed more than 50 years ago.
Yes. The Yellowstone Volcano Observatory (YVO), a partnership between the United States Geological Survey (USGS), Yellowstone National Park, and the University of Utah, closely monitors volcanic activity at Yellowstone.
The heat and geologic forces fueling the massive Yellowstone volcano affect the park in many ways. Yellowstone's many geysers, hot springs, steam vents, and mudpots are evidence of the heat and geologic forces.
Activity leading to a possibly impending volcanic eruption or a large earthquake can be evaluated using the modern seismic and
Although it is possible, scientists are not convinced that there will ever be another catastrophic eruption at Yellowstone.
The monitoring update has information about the latest volcanic activity at Yellowstone.