with a machine
As a result of its viberation
the sound wave
it creates a earthquake!
Sound is vibration that propagates to be a audible mechanical wave. It uses pressure and displacement, through air or water to be sensed whether by hearing or feeling.
A tidal wave is caused by an earthquake.
The Secondary or S-wave.
A mechanical wave.
The first shock wave of an earthquake is known as the P-wave or primary wave. It is the fastest seismic wave and can travel through both solid and liquid materials. P-waves are responsible for the initial jolt felt during an earthquake.
The P wave
An earthquake.
It can be either.
The secondary wave of the earthquake cause little damage, only a few buildings fell.