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山西中部中等地震前地震波异常特征
Characteristics of seismic wave anomaly before moderate earthquake in middle part of Shanxi province
【摘要】 以山西太原遥测台网7个子台(榆次,东山,平遥,太谷,交城,汾阳,介休)和太原台十几年的地震观测资料为基础,分析几次中等地震前地震波波速比,振幅比,地震波初动符号,S波衰减率,尾波持续时间的异常。结果表明,地震波参数的分析可以提取中等地震前的异常信息,在1991年忻州5.1级地震的前兆异常反映明显。
【Abstract】 Based on the data recorded in Taiyuan seismic station and its seven remote sensing substations (Yuci, Dongshan, Pingyao, Taigu, Jiaocheng, Fenyang and Jiexiu), wave velocity rate before shock, Amplitude rate, signal of first arrival, S wave attenuation and coda-duration of several moderate earthquakes are analyzed. The results show that from the analysis, anomaly information before the main shock could be recognized and the precursory anomalies before Xinzhou M 5.1 earthquakes in 1991 is significant.
【关键词】 波速比;
振幅比;
地震波初动符号;
S 波衰减率;
尾波持续时间;
中等地震;
【Key words】 wave velocity rate; amplitude rate; signal of first arrival; S wave attenuation; Coda-duration; moderate earthquake;
【Key words】 wave velocity rate; amplitude rate; signal of first arrival; S wave attenuation; Coda-duration; moderate earthquake;
【基金】 山西省地震局监测预报项目SBK-0204“太原盆地振幅比与波速比间的关系的研究”和SBK-0002“太原地区波速比的探讨与研究”的部分结果
- 【文献出处】 地震地磁观测与研究 ,Seismological and Geomagnetic Observation and Research , 编辑部邮箱 ,2004年02期
- 【分类号】P315.31
- 【被引频次】6
- 【下载频次】47