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Subject:
Meteorites Impact Earth?
Category: Science > Earth Sciences Asked by: mrsneaky-ga List Price: $2.00 |
Posted:
04 Feb 2003 18:07 PST
Expires: 06 Mar 2003 18:07 PST Question ID: 157420 |
How many meteorites hit the earth per day (on average)? |
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Subject:
Re: Meteorites Impact Earth?
Answered By: serenata-ga on 04 Feb 2003 18:56 PST Rated: ![]() |
Hello, Mrs. Sneaky ~ Your question was fun to research, and the answer was really astounding. According to Our Dynamic Earth, ( http://www.dynamicearth.co.uk/education/howitallstarted_science.asp ), "The number of meteorites which survive the journey through the atmosphere, land on the Earth and are large enough to be seen and found is about 2 per day." What I find more significant is that approximately "40,000 kg of material falls daily on Earth, most of it in the form of micrometeorites." That's a lot of cosmic dust added to our planet. These figures are confirmed in information provided by the Louisiana State University at Shreveport 's Shreveport/Bossier Astronomical Society at: ( http://www.lsus.edu/nonprofit/sbas/meteors.htm ) ... that micro-meteorites "... are falling continuously on us at an estimated rate of 10,000 tons daily. This amounts to about 4 ozs. per square mile per year." These figures do not take into consideration the variables of Earth's taveling through the cosmic debris of comet tails, etc., of course, which would reasonably be expected to increase the daily number during those periods. Search terms: daily meteorite impact, meteorites compacting earth Hope this helps answer your question, Serenata |
mrsneaky-ga
rated this answer:![]() Thanks! |
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Subject:
Re: Meteorites Impact Earth?
From: xarqi-ga on 04 Feb 2003 20:21 PST |
The statement: "The number of meteorites which survive the journey through the atmosphere, land on the Earth and are large enough to be seen and found is about 2 per day" is somewhat peculiar and suggess that the source may not be entirely trustworthy. By definition, ALL meterorites survive the journey through the atmosphere. It is only upon striking the Earth that they become meteorites - in the atmosphere, they are meteors - in space, meteoroids. Also, the statement that "these figures are confirmed" is questionable. There is a huge (about a factor of a 250) difference between 40,000 kg/day and 10,000 tons a day! |
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