This combination of satellite images show Uttarakhand, India on Feb. 6, 2021, before a Himalayan glacier broke off, top, and on Feb. 7, 2021, after part of the western Himalayas in the Nanda Devi National Park snapped off Sunday morning. From the dust trail seen in the satellite images, top right on the bottom image, scientists deduced that a landslide and avalanche of were more likely the cause of the floods, rather than the initially suspected glacial lake burst, said Mohammad Farooq Azam, who studies glaciers at the Indian Institute of Technology at Indore and is working with a group of international experts to study the disaster. He said that the trial of dust was generated when the mass of rocks, boulders, ice and snow came crashing down a 2-kilometer (1.2 miles), near-vertical mountain slope on Sunday. What isn't clear still is the sequence of events: Whether the landslide induced an avalanche of ice and debris, or whether falling ice resulted in the landslide. Now scientists are now trying to figure of it the heat produced during this crash because of friction was enough to have melted the snow and ice to result in the flood waters, he added. (Planet Labs, Inc. via AP)