Mysterious Global Seismic Signal Traced To Greenland Mega-Landslide: Study NDTVA mysterious signal was heard across the planet. It kept humming for nine days India TodayThe entire Earth shook for 9 days last year because of a landslide in Greenland Hindustan TimesClimate change triggered landslide, sent seismic shocks throughout Earth for 9 days, study finds Deccan Herald650-Foot High Megatsunami in Greenland Sends Seismic Waves Worldwide SciTechDaily Mysterious Global Seismic Signal Traced To Greenland Mega-Landslide: Study NDTVA mysterious signal was heard across the planet. It kept humming for nine days India TodayThe entire Earth shook for 9 days last year because of a landslide in Greenland Hindustan TimesClimate change triggered landslide, sent seismic shocks throughout Earth for 9 days, study finds Deccan Herald650-Foot High Megatsunami in Greenland Sends Seismic Waves Worldwide SciTechDaily Top stories – Google News