论文部分内容阅读
用不同余震的衰减函数模拟了1968年到1976年在内华达试验场爆炸的7次大核爆炸的余震。也研究了该区的4次天然余震序列。核爆炸余震不同于大多数天然余震,因为它们衰减比较快,并用常常用指数类函数拟合它们的衰减。核爆炸余震的震源深度一般比天然余震的浅,与核爆炸深度相对浅一致。在内华达试验场附近也观测到天然地震浅源余震的快速衰减,这说明余震震源处的条件影响余震随时间的衰减。Dieterich(1994)提出余震衰减理论预示深度浅的余震衰减更快,提供了对观测结果的一种可能解释,由于核爆炸余震的衰减快,目前在内华达试验场观测到的活动很可能已经过充分衰减了,所以目前的活动水平将持续到将来。
The aftershocks of seven large nuclear explosions exploding at the Nevada test site from 1968 to 1976 were modeled by the attenuation function of different aftershocks. Four natural aftershock sequences have also been studied. Nuclear aftershocks are not the same as most natural aftershocks because they decay relatively quickly and often use exponential functions to fit their decay. The focal depth of the aftershocks of nuclear explosions is generally shallower than that of natural aftershocks and relatively shallow to the depth of nuclear explosions. The rapid attenuation of shallow aftershocks of natural earthquakes was also observed near the Nevada test site, indicating that conditions at the aftershock affect the attenuation of aftershocks over time. Dieterich (1994) proposed that the theory of aftershock attenuation predicts a faster attenuation of shallow aftershocks, providing a possible explanation for the observations that the activity currently observed at the Nevada test site is likely to have been sufficiently full due to the fast decay of nuclear explosions Decay, so the current level of activity will continue into the future.