What we know about deadly Nepal-Tibet floods

Figure caption, Video shows scale of flash flood hitting Nepal-Tibet borderMassive landslides and flash floods on the Nepal-Tibet border have caused widespread damage and left hundreds dead or missing.Search and rescue operations are under way. Chinese state media has said there are significant casualties, while Nepalese officials anticipate "huge scale loss".Here is what we know so far.Image source, Nepal Army via EPAImage caption, Military teams were brought in to help with rescue and evacuation following the flooding on WednesdayWhat caused the deadly landslide?Nepal's foreign minister initially said an earthquake was reported on the Tibet-Nepal border shortly before the landslide, suggesting it may have triggered the disaster.The United States Geological Survey (USGS) had first reported the event as a magnitude 4.4 earthquake on Wednesday, but later confirmed the incident "was instead a glacial collapse and debris flow" that "caused subsequent catastrophic impacts downstream"."Additional analysis of nearby seismic stations, long period seismic waves, and satellite imagery led to the determination that the seismic event was instead a glacial collapse and debris flow, and that no...