posted on Feb, 22 2008 @ 10:40 AM
Originally posted by EclipseReloaded
All meteors are suppose to leave a crater.
This statement could not be more wrong!
Firstly, a
meteor is the luminous phenomenon we see high up in the atmosphere when a
meteoroid enters the atmosphere. If the object
survives the luminous phase (the vast majority do not) and part of it reaches the ground, it is then known as a
meteorite.
Secondly, unless the meteoroid was very large to start off with, it will loose much of its mass and not have enough momentum to retain a significant
portion of its cosmic-velocity. The relative density of the lower atmosphere will slow it down rapidly until it is no longer luminous, and eventually
to free-fall velocity. This stage is known as the
dark-flight phase.
Unless whatever is left is quite large, it will
not leave any crater, at least no more so than a dropped boulder from a tall cliff!
In the case in question, there was a very prominent terminal-burst (flash), which indicates that the object broke up catastrophically. If any pieces
are found, they will probably be quite small, and scattered over a wide area. It's not looking like there will be a crater in this case.
As far as I'm aware, there has only been one event of this magnitude in the past few days, and it's already being discussed here:
www.abovetopsecret.com...