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RE: (meteorobs) Fireballs & sonic booms
George Kelly wrote:
> Jure: One of the brightest fireballs I have ever witnessed, seen on
> November 4, 1971, bright as the full moon,
> [snip]
> altitude of 55 km. No sounds were heard other than the "gasps" of the
> group with which I was observing at the time.
Without checking the messages Lew mentions or Colin Keay's papers,
my recollection is that electrophonic sounds come from extremely
bright bolides, like <-18.
Malcolm
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