The Moment Magnitude Scale (MMS), denoted Mw, which measures the total energy released by an earthquake, is

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The Moment Magnitude Scale (MMS), denoted Mw, which measures the total energy released by an earthquake, is given by:
Mw = 2/3log10M0 - 10.7
where M0 is the magnitude of the seismic moment in dyne-em (measure of the energy released during an earthquake). Determine how many times more energy was released from the largest earthquake in the world, in Chile (Mw = 9.5), 1960, than the earthquake in Rat Island, Alaska (Mw = 8.7), in 1965.
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