Had the earth always rumbled, and I hadn't been aware enough to sense it?

Steve rolled back onto his feet and the earth rumbled beneath him.

For a long moment, the earth rumbled to the beat of the Ranyhyn, and the sir pulsed deeply.

The earth rumbled as an oak seedling pushed up between his fingers.

A green luminosity rose from the circle of salt, and the earth rumbled ever so lightly beneath him.

The earth rumbled under the pressures of another quake.

The earth growled and rumbled as something buried deep below was slowly forced to the surface again.

The earth rumbled again, and a hole opened right under the old woman's feet.

The earth rumbled and shook beneath their massive feet.

He felt the earth rumble and the lake stir in response to his efforts.