The ground under their feet had suddenly begun to move.

Then the ground began not only to shake, but to move.

Almost immediately, the ground within the circle began to move.

As the ground began to rise, Ben stopped the car and got out.

The ground beneath their feet is beginning to give way.

The ground was beginning to rise and fall beneath their feet.

They kept on, and gradually the ground began to rise.

That was when the ground began to move under her feet.

But by then the ground in the music business was beginning to shift.

On the other side the ground began to slope up again.