17 October 2009

Meteor/Meteorite News- Grimsby Ontario Bolide 16OCT09

Grimsby, Ontario bolide info
From: "Matson, Robert D." <ROBERT.D.MATSON@saic.com>
Date: Thu, 15 Oct 2009 11:16:08 -0700

At the beginning of the week I contacted Dr. Peter Brown at University
of Western
Ontario, letting him know that the Grimsby bolide terminal burst had
been captured
on NexRad Doppler radar images taken in Buffalo, New York. I created
several maps
of the radar returns at three different altitudes, showing that the
terminal burst
location is in perfect agreement with UWO's solution (triangulated from
all-sky cameras). I shared this information with Dr. Tony Phillips at
and he has provided links on his site to a couple of the radar images I


A wide-area map is here:


And a second map zoomed in on the terminal burst cloud is here:


As the filenames suggest, the Doppler beam altitude at this location was
a little
over 5 km, and the area covered is roughly a mile wide by 2 miles long.
were also colocated radar returns at 6.5 km and 3.7 km, though the
returns were at 5.1 km.) Judging from where meteorites were found in
Forest and Ash Creek (West), I would expect a number of meteorites to be
directly beneath the strongest radar returns, with sizes generally
as you move to the east-southeast.

I have not yet seen any images of the purported golf-ball-sized
meteorite that
hit the SUV, nor do I know where this SUV was parked, so can't judge
it's a legitimate possibility.


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