You might find this interesting. After watching this (about 20 minutes and TURN UP THE SOUND), you'll wonder why the entire west coast of the US doesn't glow in the dark.
A Time-Lapse Map of Every Nuclear Explosion Since 1945
Here's the same thing at 3X speed.
A Time-Lapse Map of Every Nuclear Explosion Since 1945 - 3 Times Faster
Yikes.