论文部分内容阅读
通过对高台、兰州、成都、安西地震台宽频带数字资料在2001年昆仑山口西8.1级地震,2008年汶川8.0级地震以及2003年山丹、民乐6.1级地震前低频波频谱变化的研究,总结了数字资料在频率域上的短临前兆异常特征,发现0.1~0.14 Hz频幅在震前几天成逐渐增强的趋势。并结合震源区构造特征对前兆机理进行了探讨。认为低频波的产生与静地震和慢地震有关。
Based on the study of the broadband spectrum changes of broadband digital data of the platforms of Gaotai, Lanzhou, Chengdu and Anxi before the west Kunlun Mountain Pass M8.1 2001, the Wenchuan M8.0 2008 earthquake and the 2003 Shandan and Mingle MS6.6 earthquakes Short-term precursory anomalies of digital data in the frequency domain indicate that the frequency range of 0.1-0.14 Hz tends to increase gradually in the days before the earthquake. Combined with the structural features of the source area, the precursor mechanism is discussed. It is considered that the generation of low frequency waves is related to the static and slow earthquakes.