[meteorite-list] Crater maker

[Chris Peterson]

A good rule of thumb is that craters are roughly ten times larger than the 
impactor that created them. There is, of course, a wide range of variability 
here, depending on velocity and other factors.

Small craters are very uncommon on the Earth because it is so difficult for 
small objects to arrive at the surface with hypersonic velocity. Most such 
objects break up before reaching the ground.

Chris

*****************************************
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


----- Original Message ----- 
From: "Michael L Blood" <mlblood at cox.net>
To: "Meteorite List" <Meteorite-list at meteoritecentral.com>
Sent: Sunday, March 20, 2005 9:39 AM
Subject: [meteorite-list] Crater maker


>I got this question (below) and wondered if anyone on the list
> has a knowledge based answer. I could only "guess" about the
> size of a basketball, but feel very much lacking in confidence
> in my guess.
>        Anyone?  Michael
>
> Can you tell me about how big of a meteorite it takes to make a Crater 
> about
> thirty feet across?