The Change of Magnitude and Recurrence Interval of Earthquakes Caused by the B-Class Active Faults

我根据每次地震的位移和阶地的年龄估计了与活动断层有关的地震的复发间隔。计算出地震的复发间隔约为2300 ~ 3700年（羽津断裂）、1000 ~ 3200年（森本—东桥断裂）、5000年（深谷断裂）和10000年（山形盆地断裂）。识别出了雾津断裂和森本-东桥断裂的复发区间变化。不同活动断层的单次地震垂直位移量差异不显著，重复周期与垂直位移率和断层位置变化成反比。

I estimated the recurrence interval of earthquakes related to active faults from displacement per event and ages of terraces. The recurrence interval of earthquakes are calculated to be about 2300 to 3700 years (Uozu fault), 1000 to 3200 years (Morimoto-Togashi fault), 5000 year (Fukaya fault) and 10000 year (Yamagata Basin fault). Uozu fault and Morimoto-Togashi fault are recognized the variation of recurrence intervals. There are no significant difference in vertical displacement per single earthquake for different active faults, and recurrence intervals tend to be inversely proportional to vertical displacement rates and variation of fault locations.