GEOL 2207 Lecture Notes - Torino Scale, Spaceguard, Natural Disaster
Document Summary
Solar system / galaxy , mass extinctions , et mechanism. Our place in the solar system / galaxy: describe the type and location of potential impactors and rate of meteoroid influx. Asteroids: smaller than planets, larger than meteoroids (sand-boulder sized, common in a series of belts between mars and jupiter, 100 000 million every 24 hours, most burn up entirely 60km above surface, shall angles. Periodicity of mass extinctions and possible et driving mechanisms: describe the hypothesis proposed by raup and sepkoski. Predicted that extinctions occur every 26-30 million years. Impact risk and mitigation: understand the risk associated with an impact hazard. Torino scale communicates threat on scale of 0-10. Assess risk of near earth objects (neo) Spaceguard survey survey asteroids > 1km: list possible mitigation strategies and appraise their relative effectiveness. Only natural disaster that can be entirely avoided (time) Fragmentation blow it up, would have to drill. Sudden orbit adjustment explode nuclear warhead, smash projectiles into asteroid/comet surface.
