Catastrophic Events Caused by Cosmic Objects

Many times all of us could hear from mass media that an asteroid approached and swept past the Earth. Such an asteroid or comet will inevitably strike the planet some day. This volume considers hazards due to collisions with cosmic objects, particularly in light of recent investigations of impacts by the authors. Each chapter written by an expert contains an overview of an aspect and new findings in the field. The main hazardous effects cratering, shock, aerial and seismic waves, fires, ejection of dust and soot, tsunami are described and numerically estimated. Numerical simulations of impacts and impact consequences have received much attention in the book. Fairly small impacting objects 50 -100 m in diameter pose a real threat to humanity and their influence on the atmosphere and ionosphere is emphasized. Especially vulnerable are industrially developed areas with dense population, almost all Europe is one of them. Special chapters are devoted to the famous 1908 Tunguska event and new results of its simulations, bolides in the atmosphere and impacts on the early Earth.

Comprehensive overview of the impact effects threatening to mankind Consideration of most interesting and important problems in the field New aspects of the problem of asteroidal hazards Sophisticated numerical simulations of impacts

Inhalt
Main Factors of Hazards Due to Comets and Asteroids.- Size-Frequency Distribution Of Asteroids And Impact Craters: Estimates Of Impact Rate.- Cometary Hazards.- Bolides in the Earth Atmosphere.- Geologic Effects of Large Terrestrial Impact Crater Formation.- Thermal Radiation and Fires After Impacts of Cosmic Objects.- Tunguska Catastrophe of 30 June 1908.- High-Velocity Impact Ejecta: Tektites and Martian Meteorites.- Marine Target Impacts.- Ionospheric and Magnetospheric Effect.- Impacts and Evolution of Early Earth.

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