A mega-tsunami caused by a landslide in Greenland caused the Earth to vibrate for nine days, a new study has shown.
The collapse of a 1.2km-high (0.7 miles) mountain peak last September caused water in the fjord below to splash back and forth, causing vibrations right through to the Earth's crust, researchers found.
It was caused by the glacier at the foot of the mountain thinning, which was the result of climate change, according to the study, which included scientists from University College London (UCL).
"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," Dr Hicks, of UCL Earth Sciences, said.
The wave extended 10km (7.4 miles) across the fjord and 110m into the air - but reduced to 7m within minutes, the study, published in the journal Science, estimates.

Mega-tsunami caused Earth to vibrate for nine days, study shows