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Complex crater formation by oblique impacts on the Earth and Moon

Title: Complex crater formation by oblique impacts on the Earth and Moon
Authors: Davison, TM
Collins, GS
Item Type: Journal Article
Abstract: Almost all meteorite impacts occur at oblique incidence angles, but the effect of impact angle on crater size is not well understood, especially for large craters. To improve oblique impact crater scaling, we present a suite of simulations of complex crater formation on Earth and the Moon over a range of impact angles, velocities and impactor sizes. We show that crater diameter is larger than predicted by existing scaling relationships for oblique impacts; there is little dependence on obliquity for impacts steeper than 45° from the horizontal. Crater depth, volume and diameter depend on impact angle in different ways—relatively shallower craters are formed by more oblique impacts. Our simulation results have implications for how crater populations are determined from impactor populations and vice-versa. They suggest that existing approaches to account for impact obliquity may underestimate the number of complex craters larger than a given size by as much as one-third.
Issue Date: 16-Nov-2022
Date of Acceptance: 19-Oct-2022
URI: http://hdl.handle.net/10044/1/100311
DOI: 10.1029/2022GL101117
ISSN: 0094-8276
Publisher: Wiley
Start Page: 1
End Page: 9
Journal / Book Title: Geophysical Research Letters
Volume: 49
Issue: 21
Copyright Statement: © 2022. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/S000615/1
Keywords: astro-ph.EP
Meteorology & Atmospheric Sciences
Notes: Accepted for publication in Geophysical Research Letters
Publication Status: Published
Online Publication Date: 2022-10-21
Appears in Collections:Earth Science and Engineering

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