Richter Magnitude Scale 2
Richter Magnitude Scale 2 : A measure of an earthquake's size. It describes the total amount of energy released during an earthquake. in the 1930's, C.F. Richter devised a way measure the magnitude of an earthquake using an instrument called a seismograph to measure the speed of ground motion during an earthquake. Geologists discovered that the energy released in an earthquake goes up with magnitude faster than the ground speed by a factor of 32