At the moment, the Yellowstone supervolcano is the most dangerous volcano in the US. The possible eruption of this volcano could be thousand times worse than the eruption of Mount St Helens in 1980.
Even though the chances of such eruption are quite unlikely, the possibility can’t be ruled out.
This volcano has a huge reserve of molten rock beneath it. This magma has a lot of silica in it and is called silicic magma.
In case of an eruption, mixture of magma, rocks, vapour, carbon dioxide and other gases would be released from the ground. Magma would be released after the explosion of gas.
About 90.000 people would be killed and 1,000 miles will be covered with a layer of molten ash.
About 45,000 metric tonnes of carbon dioxide is released each day by this supervolcano. Researchers have found two chambers of magma under the volcano. The secondary chamber is larger than the first one and is known as the upper-crustal magma reservoir. This chamber was discovered on the basis of seismic waves from almost 5,000 earthquakes. Researchers concluded that this reservoir holds 98 per cent hot rock.
On the other hand, some researchers claim that a possible eruption of the Yellowstone supervolcano won’t be that catastrophic. It would only cover cities across the country with ash and shut down air travel and communications.
Based on the program Ash 3D, it was concluded that cities up to 300 miles from the park would be covered by up to three feet of ash. Any cities further away would be covered with just a few inches of ash.
However, it has been noted that the huge cloud of ash could induce a year-long winter.
Similar thing happened in 1815 eruption of Mount Tambora in the Pacific. A year without a summer was caused by an ash cloud tens of miles across. Snow was falling in June in the North Eastern United States.
Consequences of huge amount of ash are serious and the possibility of an eruption should not be ignored.
The last activity of Yellowstone volcano was documented 70,000 years ago.