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What about the supervolcano[1] risk around Yellowstone, or the megatsunami[2] risk from intraoceanic volcanic islands on either cost or near Lituya Bay in Alaska[3], or meteors? Where do you go to avoid meteors?

[1] http://en.wikipedia.org/wiki/Supervolcano

[2] http://en.wikipedia.org/wiki/Megatsunami

[3] http://en.wikipedia.org/wiki/1958_Lituya_Bay_megatsunami

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Considering that the ash bed from the last Yellowstone super-volcano eruption extends southwest almost to Los Angeles, south to Mexico, southeast to the Gulf, east almost to the Great Lakes, and northeast to Canada, "risk around Yellowstone" is a massive understatement.

Super-volcanos are amazing in how widespread their destruction is.

From what I remember, if the volcano at Yellowstone does erupt, pretty much everyone will be screwed.

Is there any speculation on how much of a forewarning we'd have if it were to erupt?

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