[meteorite-list] How Many Meteorites Fall Each Year?

From: Sterling K. Webb <sterling_k_webb_at_meteoritecentral.com>
Date: Wed, 6 Aug 2014 16:37:01 -0500
Message-ID: <157232.89249.bm_at_smtp115.sbc.mail.ne1.yahoo.com>

Dear Anne, Al, List,

A long post on the question of
how many meteorites fall each
year was posted to The Meteorite
List back in the year 2000. It
can be found at:
http://archive.today/Yx4Fc

>From that post, you can follow
the thread forward and backward
if you want to read all the
discussion. There was quite a
bit of discussion, as I recall.

It gives the figures from the
Canadian MORP study and other
sources, as well as discussing
methods of calculating the fall
rate.

Sterling Webb
------------------------------------
-----Original Message-----
From: Meteorite-list [mailto:meteorite-list-bounces at meteoritecentral.com] On
Behalf Of almitt2--- via Meteorite-list
Sent: Tuesday, August 05, 2014 8:19 PM
To: meteorite-list at meteoritecentral.com
Subject: Re: [meteorite-list] GA NC TN AL KY Meteor Approx 2320 EDT //2220
CDT 02AUG2014

Hi Anne and all,

There are many scientifically calculated fall rates. Most assume meteorites
that have landed are 100 grams or larger as those are deemed more findable.
A Canadian study estimated some 21,000 falls per year.
We loose 3/4 in the oceans, leaving some 6,000 to land on dry land.
Many of those land in remote areas away from the notice of people.
Higher populations usually result in the notice of more falls. Light
pollution probably reduces that number some.

Of all the falls, only 0.1% or about 5 to 6 falls per year are actually
collected. The 1933 year was an excellent year for recovery of falls.
17 meteorites of the potential fall total were recovered!

According to this Canadian study we are really no better at recovery of
falls than we were in the past. Even though meteorite falls are better
understood than in the past. It is important to keep this in mind as there
are many unlocated falls all over the world.


Source for some of this information:
Canadian fireball rates and meteorite falls - declining returns by Martin
Beech Campion College, The University of Regina, Regina, Saskatchewan,
Canada


--AL Mitterling
Mitterling Meteorites



Quoting Anne Black via Meteorite-list <meteorite-list at meteoritecentral.com>:

> I am curious.
> It is practically everyday that a fireball is spotted somewhere around
> the globe, but......
>
> - How many of those "fireballs" are real fireballs, not plane,
> fireworks, lighting,....... etc?
> - How many of those real ones burn up in the atmosphere?
> - How many make it to the ground and produce meteorites?
> - And finally how many of those are ever found soon enough to be
> called Falls?
>
> Is anyone keeping track of those numbers?
> The percentage meteorites <> fireballs would be interesting.
>
>
> Anne M. Black
> www.IMPACTIKA.com
> IMPACTIKA at aol.com

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Received on Wed 06 Aug 2014 05:37:01 PM PDT