A landslide and mega-tsunami in Greenland made the Earth vibrate for nine days.
A Greenland tsunami caused vibrations that went through to Earth's crust
A study has revealed that the collapse of the 1.2km-high mountain peak last year caused water in Dickson Fjord to splash back and forth, triggering vibrations through to the planet's crust.
Scientists at University College London (UCL) say the events were caused by the glacier at the foot of the mountain thinning due to climate change.
Dr. Stephen Hicks, co-author of the research at UCL Earth Sciences, said: "This is the first time that water sloshing has been recorded as vibrations through the Earth's crust, travelling the world over and lasting several days.
"Even though we know seismometers can record a variety of sources happening on Earth's surface, never before has such a long-lasting, globally travelling seismic wave, containing only a single frequency of oscillation, been recorded.
"Our study of this event amazingly highlights the intricate interconnections between climate change in the atmosphere, destabilisation of glacier ice in the cryosphere, movements of water bodies in the hydrosphere, and Earth's solid crust in the lithosphere."