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我们研究了加州几个地区古地震记录的时间分布,时间的尺度从数十年至数十万年。分析时使用了断层泥的电子自旋共振坪的定龄方法所获的年龄数据,断层带~(14)C定龄的沉积物及历史地震的记录。在加州中部的圣安德烈斯断层中历史记录和圣加布里埃尔断层带的古地震记录都具有自相似特性,分维为0.43～0.46。在历史地震和古地震时间尺度上,加州南部的圣安德烈斯断层带的分维是0.67,表明比加州中部更为均匀的断层活动。在小于一年的时间尺度上,很大程度的分布是随机的。
We examined the time distribution of paleoseismic records in several areas of California from decades to hundreds of thousands of years. The age data obtained from the age-stabilized method of electron spin resonance of fault slurries and the record of ~ (14) C age-related sediments and historical earthquakes in the fault zone were used in the analysis. The history records in the San Andres Fault in central California and the paleoseoseismic records in the San Gabriel fault zone have self-similar characteristics with a fractal dimension of 0.43-0.46. On the historical earthquakes and paleoearthquakes, the fractal dimension of the San Andrés fault zone in southern California was 0.67, indicating more uniform fault activity than in central California. In less than a year’s time scale, a large degree of distribution is random.