Funny...the subject came up the other day about weather fluctuations, and I mentioned the year that had no summer and how in England that was the basis for several years of Currier and Ives White Christmas scenes, which are apparently unusual in England before or since. When asked why, I said it was a volcanic eruption, but could not remember the name...as I searched my memory, a pictograph of relative eruption sizes flashed into my head, and I remembered Tambora was WAY WAY bigger than Krakatoa or Pinatubo...so I said that must have been it...:)