What is capacitance of the Earth?

Answer 1

In relation to what? You would need a second conductor to answer that question.

Answer 2

Capacitance means how much charge is stored in a system. In the electrical systems Capacitance is charge per unit volt . An Electric field is volt per unit charge.
So capacitance is the inverse of the electric field.

On the Earth the Capacitance would be the amount of charge per unit weight.. or the amount of mass stored in a charge divided by a Gravity force.

The Gravity field is the amount of weight per Unit mass that that was stored as a gravity charge.

So the capacitance of the Earth is a function of an inverse Gravity field.

This indicates that the Electrical phenomena and the Gravity phenomena are one and the same.(unified force theory)

Very vely simple.

Answer 3

probably enough Coulombs to tear the earth apart