For the Richter scale, each increase on the scale represents ten times the amount of ground motion recorded on the seismogram. How much more motion is there for a magnitude 7 earthquake that a magnitude 4 earthquake.

                                                       In this scale, each increase on            the scale represents ten times the amount of ground motion recorded on a seismogram. In this scale, each increase on the scale represents 31.5 Times more energy released by the earthquake.

Explanation:

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