Comet and Asteroid Impact Hazards on a Populated Earth
نویسندگان
چکیده
منابع مشابه
The Comet/asteroid Impact Hazard: a Systems Approach
The threat of impact on Earth of an asteroid or comet, while of very low probability, has the potential to create public panic and – should an impact happen – be sufficiently destructive (perhaps on a global scale) that an integrated approach to the science, technology, and public policy aspects of the impact hazard is warranted. This report outlines the breadth of the issues that need to be ad...
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A set of 50,000 artificial Earth impacting asteroids was used to obtain, for the first time, information about the dominance of individual impact effects such as wind blast, overpressure shock, thermal radiation, cratering, seismic shaking, ejecta deposition, and tsunami for the loss of human life during an impact event for impactor sizes between 15 and 400m and how the dominance of impact effe...
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There exists an infrequent, but significant hazard to life and property due to impacting asteroids and comets. There is currently no specific search for long-period comets, smaller near-Earth asteroids, or smaller shortperiod comets. These objects represent a threat with potentially little or no warning time using conventional ground-based telescopes. These planetary bodies also represent a sig...
متن کاملThe hazard of near-Earth asteroid impacts on earth
Near-Earth asteroids (NEAs) have struck the Earth throughout its existence. During epochs when life was gaining a foothold f 4 Ga, the impact rate was thousands of times what it is today. Even during the Phanerozoic, the numbers of NEAs guarantee that there were other impacts, possibly larger than the Chicxulub event, which was responsible for the Cretaceous–Tertiary extinctions. Astronomers ha...
متن کاملNear-Earth Asteroid Search Programs
The discovery of the potentially hazardous near-Earth asteroid (NEA) component of the minor-planet population has been enhanced by better detecting and computing technology. A government mandate to quantify the terrestrial impact hazard and to detect 90% of all NEAs larger than 1 km can be realistically addressed. The characteristics, capabilities, and strategies of the major search programs il...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2000
ISSN: 0096-3941
DOI: 10.1029/00eo00276