More
http://en.wikipedia.org/wiki/Infrasound (A way to detect meteor strikes)

Nice Graphics
http://neo.jpl.nasa.gov/news/2008tc3.html
"The data are consistent with the predicted arrival direction and time and suggest a kinetic energy of about 1.1 - 2.1 kilotons of TNT. "



http://en.wikipedia.org/wiki/Bolide#Bolide