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Magnitudes of Earthquakes

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An earthquake with a magnitude 8 releases a million times more energy than an earthquake with a magnitude of 4. I need this explained in mathematical terms let M1 and M2 be the two given magnitudes.

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Magnitudes of earthquakes are examined.

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E = (10^M)^(1.5)

Let M1 and M2 be the magnitudes and E1 and E2 be the ...

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