[meteorite-list] Suspected Meteorite Falls in Cambodia
Ron Baalke
baalke at zagami.jpl.nasa.gov
Wed Jan 26 15:28:17 EST 2005
>
> I have grave doubts that anything on the ground was burned because of a
> meteorite fall. There is simply no way to get a meteorite to the ground hot
> without it retaining cosmic velocity, which means you would have a cratering
> event.
That's true. Any meteorite that is still ablating when it reaches the ground
is traveling at hypervelocity, and will leave a rather sizeable crater upon
impact. We haven't had such an impact in recorded human history. Most meteorites
will have hit the ground from a freefall speed, of less then 200 mph. So, it
is extremely unlikey a meteorite would cause a fire from ablation.
BUT
There is still a couple of other ways a meteorite can cause a fire. If the
meteorite hits something combustible on the ground and causes it to ignite or
explode. A gas tank of a car, for example. Or the fireball appearance startles
someone on the ground who knocks over a gas lantern, or drops his lit cigarette,
and a fire then ensues.
Ron Baalke
More information about the Meteorite-list
mailing list