India, June 7 -- A massive rockslide in Greenland in 2023 triggered a rare and persistent 'mega' tsunami of sorts that ricocheted within the steep walls of a remote fjord for nine days, according to new satellite data released by NASA and international researchers.

The international Surface Water and Ocean Topography (SWOT) satellite mission, a collaboration between NASA and France's CNES (Centre National d'Etudes Spatiales), detected the tsunami's contours.

The event, which unfolded in the Dickson Fjord in eastern Greenland, was captured by the Surface Water and Ocean Topography (SWOT) satellite - a joint mission between NASA and France's CNES - revealing never-before-seen details of how water surged and tilted inside the fjord after t...