later read
Gozira !
Interesting fact. Just sitting reading this post, you have over 500 kilo ton of energy. The earth is moving through the galaxy at about 1,300,000 mph or 361 m/sec. Your body is almost all water which is denser than ice. The reader of this post has 22 times the energy of explosion.
http://impact.ese.ic.ac.uk/ImpactEffects/