“For my sins, I got stationed in Providence when I was in the Navy,” Colied lained. “If America ever needs an enema, that’s where you’d plug it in.”

“Oh.” Kelly laughed-nervously. “I’ve heard the same thing about Buffalo and Syracuse.”

“Only from people who’ve never been to Providence.” Colin spoke with complete assurance.

“If you say so.” Kelly hurried on: “Then we’d get the ashfall all over the place, like we did before. And bunches of particles would go twenty or thirty miles up into the stratosphere and block off sunlight. Best estimate-”

“Guess, you mean,” Colin broke in.

“Guess. You’re right. It’s not like we can make the experiment. Best guess is, global temps go down about five degrees Celsius-nine degrees Fahrenheit. For years. Ten? Twenty? Two hundred? Nobody knows.”

Colin thought about that. L.A. nine degrees cooler would be more like Portland or Seattle-different, but not too bad. But Seattle nine degrees cooler would be more like Anchorage. Brr! And Anchorage nine degrees cooler would be like the North Pole. So would London and Stockholm and Moscow and lots of other places. The North Pole would be more like the South Pole. The South Pole… He didn’t want to contemplate what the South Pole would be like.

“Start of a new Ice Age?” he asked.

“There doesn’t seem to be any cause-and-effect between supervolcanoes and glaciation,” Kelly said. “But it sure wouldn’t be fun. Back seventy-five thousand years ago, Mount Tabo in Indonesia blew up. It’s Lake Tabo now-that was even a little bigger than the biggest blast here. And, about that same time, genetics studies show Homo sap almost went extinct. We got squeezed down to a few thousand people. Why? The bad weather from the supervolcano makes the best sense.”

“Happy day. Happy, uh, bleeping day.” Colin almost slipped. “That’ll give me sweet dreams tonight.”

“If it makes you feel any better, you’re standing in the middle of the last big caldera,” Kelly said cheerfully. “And there’s another caldera-a smaller, newer one-under the water in the West Thumb. There are little calderas all over the place in Yellowstone, if you know where to look.”