Download Catastrophic Events Caused by Cosmic Objects by Vitaly Adushkin, Ivan Nemchinov PDF

By Vitaly Adushkin, Ivan Nemchinov

An asteroid or comet will unavoidably strike the Earth a few day, and in all probability reason nice destruction. This quantity considers dangers as a result of collisions with cosmic items, fairly in gentle of modern investigations of affects by means of the authors. every one bankruptcy, written through knowledgeable, comprises an summary of a facet and new findings within the box. assurance describes and numerically estimates the most unsafe results.

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Robert, and Park Forest were also observed by numerous eyewitnesses. 3% of the Earth’s surface. In recent years global observational system, which covers almost the total Earth surface, appeared. This satellite system consists of few geostationary satellites, which belong to the US Department of Defense (Tagliaferri et al. 1994). Its primary goal is to register nuclear explosions and missile starts, but it also detects bright light flashes in the atmosphere, which are caused by bolide entries. The satellites are equipped by optical sensors with detail temporal resolution and infrared sensors.

Data of optical observations in 1994–1996 (51 events) were considered by Nemtchinov et al. (1997a). 4 kt TNT) was registered on 1 February 1994 in the nearby Marshall Islands. This area is unpopulated and ground-based observations of this event were scarce (McCord et al. 1995). The satellite observational data were used to determine kinetic energy Ek of meteoroids entering Earth’s atmosphere (in the energy range Ek ∼ 0 06−40 kt TNT; Nemtchinov et al. 1997a,b). Several methods were suggested for SN data interpretation.

Icarus 137:84–121 Williams DR, Wetherill GW (1994) Size distribution of collisionally evolved asteroidal populations— analytical solution for self-similar collision cascades. Icarus 107:117–128 Zahnle K, Schenk P, Levison H et al (2003) Cratering rates in the outer Solar System. Icarus 163(2): 263–289 Zimbelman JR (1984) Planetary impact probabilities for long-period comets. ru Abstract: 1 The incremental influx of cosmic material on the Earth shows few maxima in the dependence on the size of falling meteoroids (Ceplecha 1992).

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