"Comparing explosion sizes to reveal their true destructive power. How to Survive is a Webby Award-winning series offering expert tips for surviving disasters, attacks, and life's toughest situations.

Following the explosion of the upper ... instead of burning up in the atmosphere, he told the website, so the numbers put forth by Barker are likely the upper end of the damage spectrum.

Secondary gravity waves are ripples in the atmosphere created when primary gravity waves, like those triggered by a volcanic ...