Approximately how much more energy is released in a 6.5 Richter magnitude earthquake than in one with magnitude 5.5?

Question

Quizplus · Accepted Answer

Each increase of 1 on the Richter magnitude scale represents a tenfold increase in the energy released. Therefore, a 6.5 magnitude earthquake releases 10 times more energy than a 5.5 magnitude earthquake. Since this increase happens twice (from 5.5 to 6.5), the total increase in energy is 10 x 10 = 100 times, or 30 times in terms of the magnitude difference.

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