The purpose of this article is actually geared more toward the members of this site who live within the United States, as those in Canada, Mexico, or other countries overseas will not be affected in quite the same way. Please note that the images are courtesy of Wikipedia. While I was making images of my own, I came across the ones below which really illustrated my point perfectly. I am sure that most of you are familiar with Yellowstone National Park and that it is a highly active volcanic region, currently classified as a supervolcano. What you may not know is just how active it has been in the last few years and what effect it had the last time it erupted. First things first. Not many people realize that the Yellowstone Caldera didn't always used to be in Wyoming. In fact, just 15 million years ago, it was straddling the border of Oregon and Nevada. You see, every time it has a major eruption, the location of the caldera moves as a new caldera is formed. Over the years it has had eruption after eruption until ending up in it's current location in the Northwest corner of Wyoming. This is a map which plots the path that the Yellowstone Caldera has taken during it's known existance. The numbers correspond to millions of years ago. The last eruption, however, was 640,000 years ago. That is the 0.6 on the map. You can expect that if another eruption occurs in our lifetime, that the Yellowstone caldera will continue on it's path. Where it will end up is anyone's guess. Now let's take a look at the last known eruption. It occurred roughly 640,000 years ago and brought the caldera to it's current location where it was discovered in the 1800's during the Lewis & Clark expedition. This is known as the Lava Creek eruption. It is estimated that the eruption shot a plume of ash consisting of 240 cubic miles of dust, rock and debris into the air. That ash was then carried by the prevailing winds across most of the United States as illustrated in the image below. So what does this mean? It means that roughly 3/4 of the United States will be covered with several feet of ash. Geological research has discovered that the areas of North and South Dakota were covered by around 8-feet of ash in the Lava Creek eruption. This also means that the global temperature is likely to dramatically drop for anywhere from 1-3 years. Crops will likely fail. Food and fuel prices will rise. People will die. And that brings us to the present. Yellowstone has been under constant study since 1923. The land mass of the caldera normally rises and lowers every year by around half an inch. However, in the last few years, the land mass has risen by about 2-3 inches per year. This is usually an indication that pressure is building up within the magma chamber beneath the park. Will the caldera erupt within our lifetime? Only time will tell. Stay safe and be prepared. Thanks for reading.