As seismologists gained more experience from earthquake records, it became obvious that the problem could not be reduced to a single peak acceleration. In fact, a full frequency of vibrations occurs.
By moving them vertically, a representative mean curve could be formed, and individual events were then characterized by individual logarithmic differences from the standard curve.
If one introduces the concept of energy of an earthquake then that is a theoretically derived quantity.
I was lucky because logarithmic plots are a device of the devil.
Logarithmic plots are a device of the devil.
Don't wait for extraordinary circumstance to do good; try to use ordinary situations.