8.7-magnitude earthquake off Sumatra

A scientist points to a seismograph after a powerful quake in 2007. US monitors issued an Indian Ocean-wide tsunami watch following a massive earthquake off the coast of Sumatra Wednesday but said it was not yet certain a giant wave had been generated.

A scientist points to a seismograph after a powerful quake in 2007. US monitors issued an Indian Ocean-wide tsunami watch following a massive earthquake off the coast of Sumatra Wednesday but said it was not yet certain a giant wave had been generated.