There's also long been talk about a big earthquake due in central Utah. Really there are so many "big ones" due it'd be thematically disappointing if they didn't all happen at once and then set off Yellowstone as a finale. But in the real world, it's scary thinking about how many people will die and how poorly it will be handled. Anything that could cripple a large part of the US has worldwide ramifications, too. Living in the Seattle area the best I can hope for is that I'm individually prepared enough and will have the fortitude to help others around me as best I can.