A glacial collapse and debris flow, not an earthquake, triggered catastrophic flooding in Nepal and Tibet, according to the United States Geological Survey (USGS). What was initially reported as a 4.4 magnitude earthquake was actually the seismic impact of a massive glacier chunk crashing into the valley. Senior lecturer in disaster risk and resilience at the University of Canterbury, Tom Robinson, explains how warming temperatures are destabilising Himalayan glaciers, making such events increasingly likely. Follow our live blog here: https://cna.asia/3UmKGlZ