The earth shuddered and screams lifted from the humans become animals.

There was a sound in the distance, and the earth beneath the adventurers shuddered.

The earth shuddered with the urgency of his need.

The earth shuddered in response, and the sharp sound of concrete shattering filled the air.

The earth shuddered for several seconds, and then all was still.

There was a low, sullen rumbling from deep in the ground, and the earth shuddered.

The earth shuddered underfoot like a sleeper moving to a more comfortable position.

Ulath jumped back as the earth under his feet shuddered slightly.

The earth shuddered slightly and contorted itself into his picture of the continent.

All this time the earth was shuddering beneath us, but everything that might be knocked off shelves had been put away by now.