Earth is the homeworld of the Human race, located in the Sol System. It is the third planet of the system, orbiting at precisely 1 AU from its parent star, a G2-V Main Sequence star known as Sol, or simply The Sun. Contrary to popular belief, Earth is not the Federation's headquarters - it is Mars.
What causes whole body vibration. Drivers of some mobile machines, including certain tractors, fork lift trucks and quarrying or earth-moving machinery, may be exposed to WBV and shocks, which are associated with back pain.
The cause is often the same as this vibration sensation that is not reflected in muscle activity: some kind of pinching of a nerve as on a bone can cause this sensation. It can also be caused, if there is no pinched nerve, by a problem in a nerve going to your foot--a damaged nerve can send a signal like this.