E-Mail Credit: Irfan Rashid, Department of Geoinformatics, University of Kashmir On February 7 of this year, the Chamoli district in the Uttarakhand region of India experienced a humanitarian tragedy when a veritable wall of rock and ice collapsed and formed a debris flow that barreled down the Ronti Gad, Rishiganga, and Dhauliganga river valleys. The massive slide, caused when a wedge of rock carrying a steep hanging glacier broke off a ridge in the Himalayan mountain range, and the resulting debris flow, led to the destruction of two hydropower generating facilities and left over two hundred people dead or missing. A self-organized coalition of fifty-three scientists came together in the days following the disaster to investigate the cause, scope, and impact of the flood and landslide. Their study, which analysed satellite imagery, seismic records, and eyewitness videos to produce computer models of the flow, was published online today in the journal