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 ...

Regular tsunamis are destructive, but mega tsunamis are on another level. Could one really reach skyscraper heights? How are they formed, and what would happen if the biggest one ever hit?

In the new study, published online Jan. 19 in the journal Marine Geology, researchers analyzed an extensive set of petroleum ...