7. Geological Disasters

S1, E7: Every year millions of people experience the effects of geological disasters. New methods of predicting and preventing such events seem to be helping, but are nowhere near perfect. In 6 seconds an avalanche can reach 130 kilometers per hour; once the snow stops moving it freezes like cement, trapping victims; a mudslide or landslide is similar to an avalanche, a fast moving flow of mud.