Waves moving across the ocean at incredible speeds. Walls of water reaching 30 meters (100 feet) high. Enough force to tear ...

Add Yahoo as a preferred source to see more of our stories on Google. This map of Japan shows where an underwater earthquake triggered tsunami alerts Monday. Tsunami warnings issued by the Japanese ...

A powerful offshore earthquake in northern Japan triggered tsunami warnings Monday, sending tens of thousands scrambling to higher ground. Half a world away, it raises a simple question: How do ...