Candidates for multiple impact craters?: Popigai and Chicxulub as seen by the global high resolution gravitational field model EGM2008

0355907 - ASÚ 2011 RIV DE eng J - Journal Article
Klokočník, Jaroslav - Kostelecký, J. - Pešek, I. - Novák, P. - Wagner, C. A. - Sebera, Josef
Candidates for multiple impact craters?: Popigai and Chicxulub as seen by the global high resolution gravitational field model EGM2008.
Solid Earth. Roč. 1, č. 1 (2010), s. 71-83. ISSN 1869-9510. E-ISSN 1869-9529
Grant - others:ESA(XE) ESA-PECS project no. 98056
Institutional research plan: CEZ:AV0Z10030501
Keywords : impact craters * gravity field model EGM2008 * second radial derivatives
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

The Earth gravity filed model EGM 2008 is complete till degree and order 2160 and provides resolution of geoid and derivated quantities 5x5 arcmin (about 9 km half wavelenght on the equator). With this model and using gravity anomalies and second radial derivatives of the disturbing geopotential we tested all impact meteoritic craters known on the Earth with diamater larger than about 30 km. In the case of Chicxulub (Yucatan) and Popigai (Siberia) we suggested that these craters may not be single but double. It is in a detail discussed in this paper.
Permanent Link: http://hdl.handle.net/11104/0194572