Both the data of nature earthquakes and experiments in laboratory show that the relation between magnitude and logarithm of frequency is not a rigid straight line.
天然地震资料和实验室资料均表明，震级与频度对数之间的关系不是一条严格的直线。
2
Experiment results showed that the relation between exciting voltage and induced velocity magnitude was linear, but the influence of supply frequency was not evident.
The G-R relation between the earthquake magnitude and frequency has been an important premise in seismological study, but its actual distribution often deviates from its theoretic result.