[shadowman99]

This topic came up last week and I've been thinking about it ever since. Somebody suggested looking up information on Supervolcanos. It's quite disturbing. Yellowstone has had a super eruption roughly ever 600,000 years for the last 2 million years. Yellowstone is roughly 40,000 years overdue for such an eruption.

[cogitator]

Yellowstone is roughly 40,000 years overdue for such an eruption.

So it could happen tomorrow or 20,000 years from now, or anytime in between. Don't lose too much sleep!

[null and void]

I'm guessing that the lack of evidence of ash falls in Canada is only because the various Ice Age glaciers scraped them off...

[Centurion2000]

Good Lord that is a huge affected area. If that thing went up it would be the end of the US.