[16 February 2013]Not a Geohazard, but ...: The meteorid that exploded on Friday, 15 Februray 2013 over the Russian city Chelyabinsk is not considered a geohazard, but it illustrated the power and impact a much larger asteroid would. It also underlined the possibility of surprises, both in form of large asteroids, extreme volcano eruption, extensive floods, and long droughts. All of these 500-year or 1000-year events could happen any time. We are not prepared for these rare, high impact events. It is interesting to note that when the explosion was visible, many people went to the most dangerous place to be: the window. The delayed shock wave exposed them to a storm of glas particles. Watch the meteorite, Read the NYT article ....