[meteorite-list] Peruvian bolide post #3

[Matson, Robert]

Here was the third volley from yesterday:

- - -
From:  Randall Gregory
Sent:  3/1/2007 5:40pm

Hi Robert,
 
Enclosed is the workshop brief on small impact cratering. You can see
the velocities associated even with small craters. Could you define
your area of expertise. I'm not questioning it, just curious.
 
http://www.lpi.usra.edu/meetings/impact2003/pdf/8004.pdf

> There is absolutely NO WAY a meteoroid with cosmic velocity hit
> the earth in Peru without the entire world knowing about it.

It was published repeatedly. How often does the world read Peruvian newspapers?
 
> Pardon my saying so, but you are obviously well out of your area
> of expertise.  There is absolutely NO WAY a meteoroid with cosmic
> velocity hit the earth in Peru without the entire world knowing
> about it.  Do you have any idea how large an object has to be in
> order to retain much of its cosmic velocity and impact the ground
> at even 5 km/sec, let alone 15 km/sec?  As I wrote earlier, you
> wouldn't be talking about a puny 1 kiloton event.  The shock wave
> would have killed your witnesses.
 
I refer you back to the link and associated velocities. Show me your
math using standard equations. Model this baby!
 
I sent you the seismic waveforms.
 
I'm waiting... 29, 28, 27, 26  :)
 
With best regards,
 
Randall