The Richter Scale reading of an earthquake is based on a logarithmic equation Suppose R log 4 where A the measure of the amplitude of the earthquake wave Ao the amplitude of the smallest detectable wave or standard wave An earthquake is measured with a wave amplitude A 0 4471 while the smallest detectable wave Ao is measured at 0 0001 cm What is the magnitude of this earthquake using the Richter scale to the nearest tenth The earthquake registered 8 3 x on the Richter scale