I actually lived about 5 miles from this site when it went off. It shook the house, and when I looked outside (I have a clear view of the local coal-fired plant near the site) I saw the huge smoke plume. I immediately hopped in my truck and hauled ass to see what'd happened. I made it there before most of the police and fire dept. made it and got some pretty good photos of the 300+ ft fireballs the site kept throwing up every minute or so from about 2 blocks away.
The second link is worth a peek just to see a two-yard wide chunk of 3" thick metal tank snapped off like a piece of chocolate bar.