researchers say they've solved the mystery of the origins of the seismic signal that shook the Earth for N9 days last September they've pinned down to a massive Landslide which caused a tsunami in a remote fud in Greenland the risk of these Arctic landslides is increasing because of climate change according to scientists as Victoria Gil reports a land continuously carved and molded by vast glaciers but in 1f in the east of Greenland a seismic event has transformed the landscape here forever so we're seeing here sort of a simulation of how this seismic signal traveled around the world when we run this we will start to see this wave this animation shows the signal that baffled scientists for 9 days in September of last year the dots are seismic monitors around the world picking up vibrations from something happening in Greenland at the same time that scientists were puzzling over that a team working in Greenland received a report of a large tsunami in the east of the country these photographs show what caused it a huge Landslide into this f look at the mountain top in this image taken before the event and look at it afterwards the top of the mountain is gone collapsed into the fud taking parts of the glacier with it the scientists analyze the depth and shape of this narrow 200 km long fud and that revealed why the tsunami the landslide CA reverberated around the world for so long the wave was essentially trapped the energy of that wave just can't escape so that wave has to just keep bouncing back and forth slushing back and forth in the fueld it just can't go anywhere never before was such a long duration sort of move large scale movement of water over N9 days in this case bin observed remote as it is this is a location that cruise ships do visit fortunately no vessels were in the area when the landslide happened but scientists say the risk of these events as increasing with clal clim change this Glacier was holding up the mountain over decades it melted and thinned and eventually millions of cubic meters of rock simply collapsed it's a destructive side effect of climate change that was felt around the world Victoria Gil everyday break ni news