Japan completed the world’s first real-time ocean floor earthquake detection system in June 2025, giving 20 seconds more ...

Japan's weather agency said Friday that a malfunction in the ocean-floor observation system off the Pacific coast, installed ...

Megathrust earthquakes are large earthquakes that occur on faults found along the boundaries between tectonic plates. The ...

For the first time, scientists have directly observed the movement of a slow earthquake at the bottom of the ocean. These imperceptible events on a human timescale could play a key role in ...

Japan’s new earthquake-detection network lengthens warning times, and researchers in Wales have harnessed nuclear blast ...

Researchers used a Global Navigation Satellite System-Acoustic ranging combination technique to detect signals due to slow slip events in the Nankai Trough with seafloor deformations of 5 cm or ...

Japan Meteorological Agency's Nankai Trough quake advisory panel said the chance of a bigger earthquake striking after a magnitude 7 tremor was once in a few hundred cases, relatively higher than ...

The Japanese government said that much more needs to be done to prepare for a possible “megaquake” to reduce the feared death toll of up to 300,000 people.

The Nankai Trough has produced large earthquakes roughly every 100 to 150 years, a study indicated last year. Japan’s Earthquake Research Committee said in January 2022 said there was a 70% to ...

The Nankai Trough is an undersea trench that runs from Hyuganada, in the waters just off the southeastern coast of Kyushu, to Suruga Bay in central Japan. It spans about 800 kilometers (500 miles ...

The Nankai Trough is an undersea trench that runs from the Hyuganada Sea, off the southeastern coast of Kyushu, to Suruga Bay in central Japan. It spans about 500 miles along the Pacific coast.

The most recent Nankai Trough quake happened in 1946 when a magnitude 8 tremor and 6.9-metre (22.6-ft) tsunami waves killed 1,330 people. ($1 = 147.0700 yen) (This story has been refiled to fix a ...