http://vancouver.cbc.ca/regional/servlet/View?filename=bc_meteor20020912

Sonic boom likely caused by meteor
CBC News (Canada)
September 12, 2003

NANAIMO, B.C. - The boom heard over Nanaimo earlier this week was 
likely a small meteor, says an astronomy professor at Malaspina 
University College. 

Prof. Bill Weller says his analysis of the seismic data from 
Wednesday afternoon shows a meteor about the size of a
toaster could have been responsible for the blast. 

"It would have come in at quite a high rate of speed, much faster 
than the speed of sound, and of course it leaves a shockwave. 

"It's the same thing that you hear behind an aircraft, the sonic 
boom, after the aircraft breaks the sound barrier," says Weller. 

A Vancouver astronomer agrees. David Dodge of Vancouver's H.R. 
MacMillan Space Centre says the sonic boom is consistent with a 
fireball entering the atmosphere and exploding. 

Dodge says cloudy skies would have prevented anyone from 
spotting the small space rock before it burned up. 


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