Three Types Of Forced Vibration

Softly a hand stretched out toward the ground. The ground was already cracked with uneven spider-web-shaped patterns on the walls of the large underground room.

Suddenly, a faint buzzing sound could be heard a taunting wave of power developed, seeping through the hand and penetrating the ground, spreading out in all corners of the ground.

A rumbling sound faintly rang out from the ground. Increasing rapidly in volume, when the ten crescendo reached its peak, the entire underground was rumbling violently! The cracks started to rapidly expand as pieces of the ceiling started to fall to the ground with dust feeling the entire underground lab.