The term of the Richter Scale is SEISMIC, which is a 7-letter word. The Richter Scale is a measure of the magnitude of an earthquake, developed by Charles Richter in 1935. It is a logarithmic scale, meaning that each whole number increase in magnitude corresponds to a tenfold increase in the amplitude of the seismic waves. The Richter Scale is used to measure the intensity of earthquakes and is still widely used today.