Richter's scale was superseded by which scale in 1979?
Mercalli Scale
Seismic Scale
Moment Magnitude Scale
S-Wave Magnitude Scale
Answer
The Moment Magnitude Scale (Mw) replaced the Richter scale as the primary means of measuring earthquake strength in 1979. Unlike the Richter scale, which was based on the amplitude of seismic waves recorded on a specific type of instrument, the Mw scale considers the total energy released by an earthquake, providing a more accurate and reliable measure of its magnitude.
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