The internet is freaking out again over a map that's been shared showing how much ash could fall on Casper if the Yellowstone supervolcano erupted.

I want to emphasize something right from the start. THIS IS NOT NEW. I've seen new shares recently, but this study from the USGS was released back in 2014. It's important that we stick to known facts when it comes to sensational subjects like the possibility of a Yellowstone eruption.

Here's the map that the USGS put together showing how much ash Casper could end up with if Yellowstone were to have a month-long eruption.


Even though this is not new data, the information is still valid. Casper (along with all of Wyoming pretty much) would be in for a world of hurt if this event ever did take place. We are in the 300 to 1,000 mm of ash area. Now, where did I put my shovel?

This map was shared as a part of a large study of what COULD happen. Notice that I didn't say what WILL happen. This is all hypothetical possibilities. They dig (no shovel pun intended) on what the ash fallout might be for a 3-day relatively minor eruption along with multi-month scenarios.

I have to admit that I normally frown when outrageous Yellowstone supervolcano theories start making the rounds again. In this case, it's some solid science that we all need to keep in mind considering how close we live to this monster volcanic system. Just understand that this data is not new even though many of your friends may be sharing it like it is. At least this one is backed up by actual USGS studies and data.

It's worth noting that Steamboat Geyser has erupted 29 times this year (last time I checked) which ties a previous annual record after being dormant for 4 years. That alone makes a little extra Yellowstone supervolcano awareness a good idea.

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