We observed the Earth's gravity to produce electricity in the magnetic sea. The gravity generator (GG) generated currents and voltages on the mesoscopic scale when we connected it in the vacuum. Gravity interacts to generate electricity in the Earth’s direction or the opposite direction by the repulsive magnetic force. The ground-based device simulates the potential energy (voltages) between gravity and magnetic seas. The GG increased simulations of gravity quantum effects using different physical set-ups. A trapped gravity was set to behave as free relativistic quantum particles or fluids, which made it possible to measure the particle position as a function of time and study the magnetic sea for different initial superpositions of positive- negative-gravity spinor state. It might explain the relativistic quantum equations, antigravity, and the heating mechanism of the Sun.