Differentiate between:

Mercalli scale and Richter scale.

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Mercalli scale Richter scale
(i) It measures the intensity of earthquake. (i) It measures the energy released during an earthquake.
(ii) The measurement is based on observed effects. (ii) The measurement is done with the help of seismograph.
(iii) Quantified from observation of the effects on earth’s surface, human beings, objects and manmade structures. (iii) Quantified from logarithmic scale obtained by calculating logarithm of the amplitude of waves.
(iv) Unit of measurement I (not felt) to XII (total destruction) (iv) Unit of measurement from <2.0 to 10.0 + (never recorded) 3.0 earthquake releases 32 times more energy than a 2.0 earthquake.

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