The ground rumbled beneath them, and he staggered to the side.

The ground rumbled and shook one last time, then shuddered into silence.

The ground rumbled and then moved beneath her feet.

He struggled to his feet, felt the ground rumble beneath him.

Under his feet the ground was rumbling hard now.

The ground rumbled and seemed to open beneath him.

It couldn't sense it, even though the ground was rumbling.

She stood up then sat down as the ground rumbled to another nuclear detonation.

The ground rumbled and churned beneath him like a living thing.

Again, he could tell because the ground rumbled slightly.