Hi Canie. That part bothered me also. I can’t help but feel that Long Valley could be very much the same.

What bothers me even more is that there is very little in the time difference between the last major eruption at Yellowstone and Long Valley. It’s about 10,000 to 30,000 years depending upon which time of the eruption you want to use.

Bishop Tuff has been found as far east as Kansas, Nebraska and Texas. I have never heard anyone referring to Long Valley specifically as being a supervolcano.

As it was pointed out by Dr. Trombley.

“Because there is no well-defined minimum size for a "supervolcano," there is no exact number of such volcanoes. Examples of volcanoes that produced exceedingly voluminous pyroclastic eruptions and formed large calderas in the past 2 million years would include Yellowstone, Long Valley in eastern California, Toba in Indonesia, and Taupo in New Zealand.”

Other "supervolcanoes" would likely include the large caldera volcanoes of Japan, Indonesia, Alaska (e.g. Aniakchak, Emmons, Fisher), and other areas.

Does give you something to think about. Take Care…Don in creepy town