Toba was about 74,000 years ago and left a caldera 18 by 65 miles wide. By comparison, Pinatubo left one 3 miles wide. The most recent Yellowstone caldera is at least 20 by 30 miles. The most recent Yellowstone event was around 640,000 years ago. I wonder if that and the Long Valley Caldera were the precipitaters of two of our ice ages. I know that there was a significant drop in temperatures after Toba, which had already begun about 125,000 years ago. Wonder what caused that. Also thought about this latest volcanic find being the start of the little ice age.
One thing we know was that after every major eruption on Earth in the last 45 years, California during the winter experiences way higher than normal rains. This was the case after Pinatubo erupted in 1991, and after two major volcanic eruptions in Iceland in 2010 and 2011. In Russia’s Kamchatka Peninsula and in the home islands of Japan, there are a large number of very active volcanoes that could erupt in a major way and could change the climate of Earth for one year after the volcano erupts.