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.
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They found evidence for a plume that is 350 km (about 220 mi) in diameter extending from the core-mantle boundary all the way to the base of the crust at Yellowstone. The suspected plume is tilted to the northeast, probably due to circulation patterns within the mantle.
The upward movement of the Yellowstone caldera floor--nearly 3 inches (7 centimeters) per year for the past three years--is more than three times greater than ever observed since such measurements began in 1923, say Smith, geophysics postdoctoral associate Wu-Lung Chang and colleagues.
Thrihnukagigur Volcano is the only spot on earth where it's advisable to explore a magma chamber from the inside. The volcano has not erupted for 4.000 years and shows no signs of coming to life anytime soon, so it is safe to enter.
Yellowstone sits above a melting anomaly within the Earth, called a “hotspot.” This hotspot is powered by a plume of hot (but not molten) material that may extend as deep as the boundary between the planet's mantle and core.
If another large, caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Such a giant eruption would have regional effects such as falling ash and short-term (years to decades) changes to global climate.
How large is the magma chamber that is currently under Yellowstone? 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.
No.A very large volcanic eruption would cause a severe cold period called a volcanic winter, but not an ice age. Volcanic eruptions cool the planet by creating a fine aerosol of sulfuric acid in the stratosphere. The highly reflective droplets prevent a portion of the sun's light from reaching and heating the surface.
Which is bigger Mauna Loa or Yellowstone? Mauna Loa volcano is the largest volcano on Earth. It is over 30,000 feet tall from the seafloor where it was born to the summit, which is 13,684 feet above sea level.
The total energy released would be equivalent to an 875,000 megaton explosion. The shockwave would kill 90,000 people. Most of the lava would fall back into the crater. Any flows would be slow and only spread 40-50km or so.