Was today's Chelyabinsk meteor destruction from an accelerated, focused "superboom" or a sonic boom? I assume it was not an explosion boom. I am trying to understand if the boom destruction radiated from central point or traveled with the meteor as an aircraft's sonic boom continually travels with the airplane. Neither do I understand if the two types of booms would be mutually exclusive and, if not, could there be two audible booms? I am not a physics guy. Have fun with incomprehensible calculations if it interests you but please try to phrase a simple answer for this dummy. Thank you.