台湾地区强震前加卸载响应比特征

对台湾地区加卸载响应比沿时间进程的发展趋势进行分析,结果显示:台湾MS≥7.0级地震前加卸载响应比可能出现高值异常或小幅度的突升现象;超过50%的7级强震前,加卸载响应比出现趋势上升异常,未来地震震级与趋势异常上升幅度、异常持续时间之间呈线性正相关,即异常持续时间越长,其上升的异常幅度也越大,未来地震的震级也越大。出现趋势上升异常的地震震中均处在北纬24°以南的台湾东带区域。

The Feature of Load-unload Response Ratio in Taiwan

This paper analyzes the time trend of load-unload response ratio in Taiwan. The results show that the load-unload response ratio would present abnormal high values or small jumps before the earthquakes with Ms≥ 7.0 in Taiwan; before over 50 percents of these earthquakes occurred, the load-unload response ratio showed abnormal rise, the anomalous amplitude and duration was linear positive correlation with the magnitude of the following earthquake, which means that the longer the abnormity continues, the larger the anomalous amplitude, and the stronger the following earthquake. All the earthquakes, which have abnormal rises before, happened in south of 24 north latitude of east Taiwan.