The Long Valley Caldera and the Cleveland Vulcano are now partnered with a third threat. It is called "Cumbre Vejia". This last one is an active vulcanic ridge forming part of Isla de La Palma - in the Canary Islands. If this goes, the eastern coast of the USA will be under water for hundreds of miles. Keep an eye on this one folks. It is waking up.
A terrorist attack on this vulcanic ridge will change the world as we know it.