Discussion
Magnitude of the earthquake in .................. scale is a measure of the energy released at the source of earthquake.
Answer: A
Energy released at the source is measured on the Richter scale.
Charles Richter's local magnitude scale of 1935 is logarithmic: each whole number step means ten times the ground-motion amplitude and about 32 times more energy released. Magnitude is a single figure for the earthquake itself. Modern agencies mostly use the related moment magnitude, but the principle is the same.
The Mercalli scale measures intensity, the observed effects and damage at a particular place, which varies with distance from the epicentre. Mohs' scale ranks mineral hardness. 'Levis' is not a seismic scale.
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