[meteorite-list] Fireball questions

[GeoZay at aol.com]

>> If  a fireball explode and create a sonic(shock) wave observed in seismic 
stations;  if the same fireball create thump rumble or thump deflagrations; 
can we suppose find a meteorite on the ground?<<
I once pursued in California a very loud sonic producing fireball with 
Caltech who monitored the various seismic stations. I was told that these kind of 
sounds were somehow filtered out so they wouldn't show up on the seismigraphs. 

>>At wich altitude a normal bolide can explode, or produce a  audible sonic 
boom?<<
To produce a sonic boom, the meteoroid would have to be at least 30 miles 
above the earth.
George Zay
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