2001年昆仑山口西Ms8.1地震震前宽频带信号的疲劳损伤分析

摘要

The high precision and sampling acquisition rate observing system of broadband digital seismometer shows that broadband digital signal contains rich crustal movement and damage information.However,the information remains to be further excavated.The broadband digital data of WMQ,LSA,ENH,KMI and XAN stations are analyzed based on fatigue damage theory,for a few days before the November 14,2001 earthquake at western Kunlunshan pass.The results show that the relative stress of the stations increases significantly in the days before the earthquake.%高精度和高采样速率宽频带地震仪的地震观测表明,宽频带数字信号包含丰富的地壳运动和应力变化信息,但这些信息还有待进一步的挖掘.对2001-11-14昆仑山口西Ms8.1地震前数日的鸟鲁木齐、拉萨、恩施、昆明、西安5个台站的宽频带数字信号,在疲劳损伤分析理论的基础上进行分析和跟踪.结果表明,在昆仑山口西地震前数天,这些台站宽频带数字信号中所包含的相对应力成分都有一个明显上升的变化过程.