Mega Disaster: It's Happened Before, It Will Happen Again

Volcanic eruptions are one of the most powerful forces on Earth. From spectacular lava fountains to deadly explosions, they can bury entire cities in clouds of ash and gas, or turn quiet rivers into seething torrents of mud and debris.

The tsunami is the ocean's deadliest force. Tremors from the depths create giant waves with rip through coastal cities and towns. There is no stopping these massive and deadly phenomena, the only thing to do is run to higher ground.

Tornados are unpredictable, volatile, and lethal. Each one is unique, leaving behind obliterated towns and bewildered scientists. From the tremendous, to the terrifying, to the tragic, this is a countdown to a mega tornado,

When the earth quakes, all hell breaks loose. They strike with lightning speed, a huge bolt of destruction with little to no warning. These forces baffle experts as they try to gather the information necessary to predict when the next big one will hit.