The Richter magnitude scale (also Richter scale) assigns a magnitude number to quantify the energy released by an earthquake. The Richter scale, developed in the 1930s, is a base-10 logarithmic scale, which defines magnitude as the logarithm of the ratio of the amplitude of the seismic waves to an arbitrary, minor amplitude.
近义、反义、联想词
近义词
n.
scale, scale of measurement, graduated table, ordered series
英英词典
richter scale n.
a logarithmic scale of 1 to 10 used to express the energy released by an earthquake