Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.338..999h&link_type=abstract
Monthly Notice of the Royal Astronomical Society, Volume 338, Issue 4, pp. 999-1003.
Astronomy and Astrophysics
Astronomy
4
Earth, Minor Planets, Asteroids
Scientific paper
When a large asteroid of diameter d hits the surface of the Earth, it produces a crater of diameter D. This paper uses the near-Earth asteroid (NEA) size and miss-distance statistics to calculate the rate at which asteroids hit the Earth. Comparison of this with the known rate at which craters have been produced on the Earth's surface indicates that E= 9.1 × 1024D2.59 erg, where E is the kinetic energy of the incident NEA, and D is the diameter of the resulting crater, in km. So the ratio D/d varies from about 8 for the small 0.88-km `Wolfe Creek type' craters, up to about 16 for craters like Chicxulub, which has a diameter of about 200 km.
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