The fault that produced the earthquake lies between two pieces of hard rock sandwiching a slippery clay layer, allowing for ...

Officials said the megaquake advisory is not a prediction and the probability of a magnitude 8 or larger quake is only about ...

A massive tsunami generated by a magnitude-9.1 earthquake struck Japan's coast within 30 minutes. Waves as high as 130 feet spilled over seawalls. Within days, three nuclear reactors were disabled.

Japanese authorities lifted tsunami warnings after a 7.5-magnitude earthquake struck northeastern regions, injuring 30 and ...

Nearly 20,000 people died in the 2011 disaster, when a 9-magnitude tremor struck under the ocean. Read more at ...