Add the Mammoth caldera. Zang! Now we know why Mormons store two years worth of food. Maybe the Masons have something in those Zoroastrian ancient mysteries of theirs.
Funny you say this. We're WASP's (my family), and we have a long history of storing (large amounts) of food for 'hard times.' This 'prepare for hard times' thing in my family predates the great depression era and I've often wondered if it's a 'hand-down' from earlier catastrophies. In fact, I presently have a sealed ,plastic five container of seeds in my deep freeze, along with a thousand canning jars and all the equipment to accomodate canning, given to me and at the insistence of my 85 year old mother. (every kind of edible food seed you can think of)