research say they solved the mystery of the origins of the seismic signal that shook the Earth for N9 days last September they pinned it down to a massive Landslide which caus a tsunami in a report land Greenland the risk of this Arctic landslides in increasing because of climate change according to scientist as a land continuously carved and molded by was glaciers but in one F in the east of Greenland a sismic event has transformed the landscape here forever so we are seeing here sort of a simulation of how this sismic signal traveled around the world when we run this we will start to see this wave this animation shows the signal that baffled scientist for 9 days in September of last year the dots are seismic monitors around the world picking up vibrations from the 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 this photographs show what caused in a huge Landslide into this world look at the mountain top in this image taken before the event and look at it it afterwards the top of the mountain is gone collapsed into the F taking parts of the [Music] [Applause] [Music] glacier with it the scientist analyze the depth and the shape of the narrow 200 kilm long F and that revealed by the tsunami that landslides caused R vared around the world for so long 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 slashing back and forth in the field it just can't go anywhere never before such a long duration sort of move large scale movement of water over 9 days in this case being observed remote as it this is a location that cruise ships do visit fortunately no vessels were in the area where the land slide happened but scientists say the risk of these events is increasing with claim 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 thank you