Prelude to the Apocalypse
The Yellowstone Caldera became a tourist attraction after it last erupted over 600 million years ago and has not erupted since then.
However, in 2009, after a massive solar flare with an unprecedented amount of neutrinos, caused the Earth's core to heat up its temperature so high, the Earth's crust became unstable and it caused the planet to come to an end in 2012.
With the Earth's crust continuing to become more and more unstable, seismic and volcanic activity began to increase worldwide, including the Yellowstone Caldera which was going to erupt soon as the apocalypse starts. Lava began forcing its way to the surface when the Earth's core temperature became so high.
On December 21st, 2012, the worldwide apocalypse had begun as massive earthquakes of unprecedented strength, began wrecking havoc across every continent around the world, plunging numerous nations into chaos. The Los Angeles Earthquake destroyed the whole state of California and caused it to sink beneath the waves of the Pacific Ocean, but the Curtis Family and Gordon Silberman managed to escape via a Cessna.
Parts of South America were hit hard by earthquakes, among those affected were Rio de Janeiro and Mexico City. In Europe, London was hit by an earthquake, causing the 2012 Olympic Games and massive riots to occur in the city.
Around midday, the Curtis Family and Gordon returned to Yellowstone to retrieve a map from Charlie Frost, which shows the location of the Arks, where the government has been secretly building and are the only things that can save them. After retrieving the map from Charlie, lava began to force its way to the surface and the Yellowstone Caldera began to erupt after being dormant for so long. The caldera erupted violently which created a blinding flash of light, a force from the supervolcano blew trees backwards and lava bombs began to shoot out and strike several areas across the park. Charlie was killed in the blast before the ash cloud began to destroy the park, but the Curtis Family and Gordon were able to escape.
The devastating ash cloud from the Yellowstone Caldera begins to spread around the country of USA and Canada, rendering it uninhabitable. When the apocalypse ended, the Caldera became inactive and was flooded by a megatsunami during the Worldwide Flooding.