Richter was an American seismologist best known for creating the Richter scale, which quantifies the magnitude of earthquakes by assigning each quake a single number based on the measurement of seismic waves. The scale is logarithmic, meaning that each increase of one unit represents a 10-fold increase in the amplitude of the waves. Though the scale has no theoretical upper limit, the most severe quakes have not exceeded a scale value of 9. What earthquake measurement method succeeded Richter’s? Discuss