A site called Zero Hedge has put out alarming reports the past two days about an increase in earthquake activity in Yellowstone National Park in Wyoming, which apparently has been followed by a quieting again. This event is seen as a possible symptom of a massive eruption of the Yellowstone caldera. The story (with links) was shared on Facebook today by a member of the “doomsday prepper” community.
Some reports claim that there is a 10% chance of a major Yellowstone eruption by the year 2100. Some claim it could be imminent. There is one massive eruption every 650,000 years and we are about due. Each eruption occurs farther east than the previous one.
There are also reports that the US is quietly contacting other nations for possible catastrophe “refugees”. But it might be possible to house people in private homes in the eastern part of the US, following the “radical hospitality” idea proposed in the past for political refugees and asylum seekers.
There have sometimes been stories that a change of water levels in some lakes in the area could predict an eruption.
A major volcanic eruption would cause an ash cloud that would block the sun’s rays in many parts of the world for some years, reversing climate change. “The year without a summer” in 1815 resulted from a massive Indonesian eruption.
Of course, when Mt. St. Helens vomited in May 1980, there was a lot of disruption, but that would be dwarfed by Yellowstone. There are some reports that the magma chamber under Yellowstone is much larger and deeper than previously thought, one of the deepest on the planet.
Recently, a young man was severely burned after falling into a hot spring in Yellowstone. I have visited the area only once, in May 1981, when it was still cold.
Wikipedia attribution link for p.d. diagram of the Yellowstone caldera.