Quote Originally Posted by Tom1956 View Post
They're just earthquakes. No man-made causes, no celestial causes, no punishment by God. They're just earthquakes, caused by the makeup of Earth and it's various plates, and gravity. There is a certain amount of outward centrifugal force cause by rotation, although I have no idea how much. It's just the world we live on.
There is no such thing as centrifugal force - just centripetal acceleration.