How earthquacks happened?

Answer 1

The tectonic plates that create earth surface move and sometimes hit each other, if they hit just a little bit, an earthquake results.

California is an example, two tectonic plates match up there, and that is why there are always earthquakes.

Some even say it will drift away from the usa because of the constant tectonic plate movement

Answer 2

Earthquakes are caused by the movement of tectonic plates within the Earth's crust. When these plates rub against each other or collide, they generate seismic waves that result in the shaking of the Earth's surface. The point where the earthquake originates is called the focus, and the point directly above it on the Earth's surface is called the epicenter.

Answer 3

The Earths tectonic plates move crating waves type in tectonic plates in Google