A tsunami warning in Japan is raising questions. Here's how tsunamis form, why warnings change and what people far from the coast should know.

Japan’s weather agency has issued its highest-level warning that a megaquake could follow Monday’s 7.5-magnitude tremor. Authorities urged anyone living near the Pacific coast to remain vigilant ...

TOKYO (AP) — A powerful earthquake struck off the northern coast of Japan, and the Japan Meteorological Agency issued a tsunami alert for the region. The quake registering a preliminary magnitude of 7 ...

A powerful quake with a magnitude of 7.7 struck northeastern and northern Japan on Monday, prompting the country's weather ...

An area of Japan that lost nearly a tenth of its population in the March 2011 earthquake and tsunami is now facing relentless ...

TOKYO (Kyodo) -- An earthquake with a preliminary magnitude of 5.7 jolted western Japan on Saturday, but no tsunami warning was issued, the country's Full article ...