Results 11 to 20 of about 68,393 (238)
Scientific African, 2023 Impact cratering is an important aspect of planetary evolution. Geophysics plays a complementary role in identifying impact craters on Earth given the non-unique geological characteristics associated with such craters. The Bosumtwi impact crater in Ghana
Cyril D. Boateng +3 more
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Scientific Reports, 2022 Bullet impacts are a ubiquitous form of damage to the built environment resulting from armed conflicts. Bullet impacts into stone buildings result in surficial cratering, fracturing, and changes to material properties, such as permeability and surface ...
Oliver Campbell +3 more
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Depth of Cracking beneath Impact Craters: New Constraint for Impact Velocity [PDF]
, 2002 Both small-scale impact craters in the laboratory and less than 5 km in diameter bowl-shaped craters on the Earth are strength (of rock) controlled. In the strength regime, crater volumes are nearly proportional to impactor kinetic energy.
Ahrens, Thomas J. +2 more
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Automatic Mapping of Small Lunar Impact Craters Using LRO‐NAC Images
Earth and Space Science, 2022 Impact craters are the most common feature on the Moon’s surface. Crater size–frequency distributions provide critical insight into the timing of geological events, surface erosion rates, and impact fluxes.
J. H. Fairweather +5 more
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Expectations for the Deep Impact collision from cometary nuclei modelling [PDF]
, 2005 Using the cometary nucleus model developed by Espinasse et al. (1991), we calculate the thermodynamical evolution of Comet 9P/Tempel 1 over a period of 360 years.
Klinger, Jurgen +3 more
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The self‐secondary crater population of the Hokusai crater on Mercury
Geophysical Research Letters, 2016 Whether or not self‐secondaries dominate small crater populations on continuous ejecta deposits and floors of fresh impact craters has long been a controversy. This issue potentially affects the age determination technique using crater statistics.
Zhiyong Xiao +2 more
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Applied Sciences, 2020 Impact cratering experiments were performed on semi-infinite concrete targets with 7 mm-diameter 40CrNiMo steel long-rod projectiles at impact velocities ranging from 2117 m/s to 3086 m/s by using a two-stage combustion light-gas gun.
Yangyu Lu +6 more
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On the importance of self-secondaries
Geoscience Letters, 2018 Self-secondaries are secondary craters that are formed on both the continuous ejecta deposits and interior of the parent crater. The possible existence of self-secondaries was proposed in the late 1960s, but their identity, formation mechanism, and ...
Zhiyong Xiao
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A comparative analysis of two Early Palaeozoic marine impact structures in Estonia, Baltic Sea: Neugrund and Kärdla [PDF]
Bulletin of the Geological Society of Finland, 2013 Kärdla and Neugrund are two Early Palaeozoic offshore impact structures located some 50 km apart along the Estonian coast of the Baltic Sea. They share many similarities but differing features are also found. The Kärdla impact structure is located at the
S. Suuroja, K. Suuroja, T. Flodén
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Morphology Scaling of Drop Impact onto a Granular Layer
, 2010 We investigate the impact of a free-falling water drop onto a granular layer. First, we constructed a phase diagram of crater shapes with two control parameters, impact speed and grain size.
Katuragi, Hiroaki, 桂木, 洋光
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