Respuesta :

An earthquake with an epicenter of a 9.0 magnitude

Answer:

A powerful undersea earthquake that struck off the coast of Sumatra island, Indonesia, set off the 2004 Indian Ocean tsunami, also known as the Christmas or Boxing Day tsunami, on Sunday morning, Dec. 26, 2004. ... The quake caused the ocean floor to suddenly rise by as much as 40 meters, triggering a massive tsunami.