8.7-magnitude earthquake off Sumatra

An image from an animation using satellite observations of the March 11 tsunami that shows how the waves of the tsunami were influenced by seafloor features. Wave peaks appear in red-brown, depressions in blue-green and ocean floor topography i

An image from an animation using satellite observations of the March 11 tsunami that shows how the waves of the tsunami were influenced by seafloor features. Wave peaks appear in red-brown, depressions in blue-green and ocean floor topography i