Japan’s “major earthquake” warning has put much of the country on high alert, even as some experts cast doubt on whether such an advisory is necessary or accurate.

Japan issued a “megaquake advisory” following a 7.1-magnitude earthquake off its coast. That raised the risk of a larger quake on the Nankai Trough, an underwater subduction zone.

The earthquake caused the planet to spin slightly faster, shortening the length of a day on Earth by 1.8 microseconds—about ...

It’s why “the Japanese government also emphasizes preparation to avoid another major tragedy like the 2011 earthquake,” he added. Japan is largely recognized to be a world leader in ...

Japan saw its largest earthquake ever recorded in 2011, a magnitude-9.1 quake that struck the Tohoku region and caused a huge tsunami. Related articles Woman shares her emergency kit 'essentials ...