The popular Richter scale for measuring the magnitude of earthquakes is based on a log₁₀ scale. Therefore, a magnitude 9 earth quake is 10 times a magnitude 8 earthquake.
That is, it takes ten magnitude 8 earthquakes to equal the energy released by one magnitude 9 earthquake.
<span>-- the product of the net charges on the objects;. -- the distance between the centers of their net charges. (Pretty much identical to the formula for gravitational force)</span>
