The concept of seismic moment was introduced in 1966, but it took 13 years before the (Mw) scale was designed. The reason for the delay was that the necessary spectra of seismic signals had to be derived by hand at first, which required personal attention to every event.
The concept of seismic moment was introduced in 1966, but it took 13 years before the (Mw) scale was designed. The reason for the delay was that the necessary spectra of seismic signals had to be derived by hand at first, which required personal attention to every event.
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