in my science book it says an earthquake
sciesmic waves ;]
hertz??
Vibrations produced by breaking of rocks are called vibrations, earthquakes are produced by these, earthquakes occur when the plates under the earths crust are built with stress and then collapse, causing them to move inward towards each other and cause large virations, producing earthquakes. 8th grade question.
after shocks
Purring
When vibrations from someone or something occur the ear captures the vibrations if it is close enough.
The mechanism for stress to be released from friction along a fault is known as elastic rebound. Vibrations occur when rocks elastically return to their original shape causing damage from the seismic waves being sent out.
It is called the frequency. The SI unit is the Hertz. One Hertz is one cycle per second.
This phenomenon is called "tribochemistry".
That's the (frequency of the vibrations) multiplied by the (number of seconds in the time interval)
frequency