The “megathrust” earthquake’s undersea magnitude was 9.0, recorded as one of the worst in Japan’s history. It began on the Pacific seabed 45 miles away from the eastern coast of Japan, as reported by ...

Japan has completed the world’s most advanced undersea earthquake and tsunami detection system—3,500+ miles of fiber-optic ...

Authorities have evacuated dozens of people from remote islands in southern Japan that have been shaken by over 1,700 tremors in recent weeks.