Heat signature on the Chelungpu fault associated with the 1999 Chi‐Chi, Taiwan earthquake
Heat signature on the Chelungpu fault associated with the 1999 Chi‐Chi, Taiwan earthquake
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DOI：
10.1029/2006gl026733
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发表时间：
2006-07
影响因子：
5.2
通讯作者：
Y. Kano;J. Mori;R. Fujio;Hisao Itô;T. Yanagidani;S. Nakao;K. Ma
中科院分区：
文献类型：
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作者：
Y. Kano;J. Mori;R. Fujio;Hisao Itô;T. Yanagidani;S. Nakao;K. Ma
我们已经观测到了与大地震断层作用时产生的摩擦热有关的热信号。在与车笼埔断层相交的约1100米深的钻孔中进行的温度测量显示，即使在地震发生六年后，断层附近的温度仍有小幅上升。温度信号具有对称形状，宽度约为40米，并以1999年台湾集集地震期间滑动约5米的断层为中心。观测到的温度异常的0.06°C的小幅度表明在地震发生时产生热量的摩擦水平非常低。
We have made observations of a heat signature that is associated with the frictional heat generated at the time of faulting for a large earthquake. Temperature measurements in a borehole that intersects the Chelungpu fault at a depth of about 1100 m, show a small increase near the fault even six years after the earthquake. The temperature signature has a symmetric shape with a width of about 40 m and is centered on the fault that slipped about 5 m during the 1999 Chi‐Chi, Taiwan earthquake. The small amplitude of 0.06°C for the observed temperature anomaly indicates a very low level of friction that generated heat at the time of the earthquake.