4月2日消息，中國地震台網正式測定：At 30:00 on October 0, a 0.0 earthquake occurred in the waters near Kyushu Island in Japan (0.0 degrees north latitude, 0.0 degrees east longitude), with an epicenter depth of 0 kilometers.

It is understood that the territory of Japan consists of four large islands and more than 3900 small islands in Hokkaido, Honshu, Shikoku, and Kyushu.The Japanese archipelago is located at the junction of the Pacific and Eurasian tectonic plates.

Plate tectonics theory believes that the earth's lithosphere is formed by the patchwork of plates, as if breaking eggshells that are still connected, plate boundaries are unstable, plate movements are pulled and squeezed, resulting in energy release, the formation of earthquakes and volcanic eruptions, and the plate boundaries where earthquakes occur are called seismic zones.

As an earthquake-prone country, Japan is located in the world's most important seismic zone, the Pacific Rim Seismic Zone, which is relatively thin, dense and relatively low according to the theory of geological plates.

When the Pacific plate and the Eurasian plate collide and squeeze, the rock formations at the junction deform and fracture, resulting in volcanic eruptions and earthquakes.