I just watched this one posted on the Guardian.
http://www.youtube.com/watch?feature...v=gQ6Pa5Pv_io#!
Visually the trail is 4:40; the boom is at 7min.
Calculating the distance via speed of sound to time difference; that's around 47000 metres.
Have I calc'd this wrong or that doesn't make sense?
Or the sonic boom travelled at a lower height above ground.