I know the Richter magnitude scale is often used for measuring the strength of earthquakes. At the same time, explosive/destructive releases of energy are often quoted in equivalent amounts of TNT. Is there some way to relate these two scales? Or are they not equivalent?
It's especially confusing since the Richter scale doesn't seem to go very high. Is a magnitude 8 earthquake really only 4 times worse than a magnitude 2? Or would converting these numbers to TNT equivalents be more revealing?