Moment magnitude scale

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Richter and Moment Magnitude Scales

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Richter Scale and the Moment Magnitude Scale

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The Moment magnitude scale

The moment magnitude scale is one of many seismic magnitude scales used to measure the size of earthquakes.

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History
- Empirical evidence
- Geologists Kiyoo Wadati
- Logarithm
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Current use
Definition
Relations between seismic moment, potential energy released and radiated energy
Comparative energy released by two earthquakes