What is the shaking of the earth 's surface due to sudden movements called?

When tectonic plates move, it also causes movements at the faults. An earthquake is the sudden movement of Earth's crust at a fault line. The location where an earthquake begins is called the epicenter. An earthquake's most intense shaking is often felt near the epicenter.

it was a act of seld fesnse more over it was a peace treaty between the fogein contunries.

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.