Abstract
An extension of the study of Herrmann and Nuttli (1982) on the relation between the m Lg and M L magnitude scales is made using the California strong motion data base. The technique of Kanamori and Jennings (1978) for synthesizing Wood-Anderson seismograms from acceleration time histories was easily extended to synthesize equivalent WWSSN short period seismograms. The m Lg and M L magnitudes so obtained are highly correlated, with the m Lg value being at least 0.30 magnitude units larger than the corresponding M L value. Using the parameters available in random vibration theory simulation, observed magnitudes and peak velocities and accelerations can be easily modeled as a function of distance.
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