Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database
We examined the hypothesis that the crater formation rate exhibits periodicity, employing data sets of Grieve (1991), Moon et al. (2001), and the Earth Impact Database (2002; DB02). DB02 is known to supercede previous compilations in terms of its accuracy and precision of the ages; it is the first t...
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2003-12-01
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doaj-8feacee8fd6349ee8654156505689ab82020-11-25T00:54:38ZengKorean Space Science Society (KSSS)Journal of Astronomy and Space Sciences2093-55872093-14092003-12-0120426928210.5140/JASS.2003.20.4.269Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 DatabaseHong-Kyu Moon0Byung-Hee Min1Seung-Lee Kim2Korea Astronomy Observatory, Yusong, Daejon 305-348, KoreaKorea Astronomy Observatory, Yusong, Daejon 305-348, KoreaKorea Astronomy Observatory, Yusong, Daejon 305-348, KoreaWe examined the hypothesis that the crater formation rate exhibits periodicity, employing data sets of Grieve (1991), Moon et al. (2001), and the Earth Impact Database (2002; DB02). DB02 is known to supercede previous compilations in terms of its accuracy and precision of the ages; it is the first time that this database has been used for periodicity analysis. For data sets comprising impact structures with D≥5km (and also those with D≥20km), there is no convincing evidence for periodicities in the crater ages, according to our Fourier analysis. However, we detected two peaks at 16.1Myr and 34.7Myr for craters with D≥30km; we confirm that the age distribution of impact craters with D≥45km has dominant power at 16.1Myr. Thus, we may conjecture a probable periodic shower of Earth impactors with sizes d≥1.5km. In addition, we found that the selection of data sets, the lower limits on the ages and diameters of impact craters, as well as the accuracy and precision of the ages, all constitute crucial factors in reconstructing the impact cratering history of the Earth.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n4/OJOOBS_2003_v20n4_269.pdfterrestrial impact cratersperiodicity of impacts |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hong-Kyu Moon Byung-Hee Min Seung-Lee Kim |
spellingShingle |
Hong-Kyu Moon Byung-Hee Min Seung-Lee Kim Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database Journal of Astronomy and Space Sciences terrestrial impact craters periodicity of impacts |
author_facet |
Hong-Kyu Moon Byung-Hee Min Seung-Lee Kim |
author_sort |
Hong-Kyu Moon |
title |
Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database |
title_short |
Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database |
title_full |
Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database |
title_fullStr |
Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database |
title_full_unstemmed |
Terrestrial Impact Cratering Chronology II: Periodicity Analysis with the 2002 Database |
title_sort |
terrestrial impact cratering chronology ii: periodicity analysis with the 2002 database |
publisher |
Korean Space Science Society (KSSS) |
series |
Journal of Astronomy and Space Sciences |
issn |
2093-5587 2093-1409 |
publishDate |
2003-12-01 |
description |
We examined the hypothesis that the crater formation rate exhibits periodicity, employing data sets of Grieve (1991), Moon et al. (2001), and the Earth Impact Database (2002; DB02). DB02 is known to supercede previous compilations in terms of its accuracy and precision of the ages; it is the first time that this database has been used for periodicity analysis. For data sets comprising impact structures with D≥5km (and also those with D≥20km), there is no convincing evidence for periodicities in the crater ages, according to our Fourier analysis. However, we detected two peaks at 16.1Myr and 34.7Myr for craters with D≥30km; we confirm that the age distribution of impact craters with D≥45km has dominant power at 16.1Myr. Thus, we may conjecture a probable periodic shower of Earth impactors with sizes d≥1.5km. In addition, we found that the selection of data sets, the lower limits on the ages and diameters of impact craters, as well as the accuracy and precision of the ages, all constitute crucial factors in reconstructing the impact cratering history of the Earth. |
topic |
terrestrial impact craters periodicity of impacts |
url |
http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2003/v20n4/OJOOBS_2003_v20n4_269.pdf |
work_keys_str_mv |
AT hongkyumoon terrestrialimpactcrateringchronologyiiperiodicityanalysiswiththe2002database AT byungheemin terrestrialimpactcrateringchronologyiiperiodicityanalysiswiththe2002database AT seungleekim terrestrialimpactcrateringchronologyiiperiodicityanalysiswiththe2002database |
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