论文部分内容阅读
以嘉峪关台的原始资料为依据 ,着重探讨了肃南 5.3级地震前祁连山西段的地震活动性异常。将本台的地磁Z分量与兰州、天水地磁台进行比较 ,结果认为 :肃南 5 3级地震的发生基本符合祁连山西段地震活动的周期性特征 ,前兆资料无明显的临震异常显示 ,但本台的自然电场、地磁日幅差和Z分量的日均值资料有明显的短期趋势性异常显示。
Based on the original data of Jiayuguan platform, this paper focuses on the anomalous seismic activity in the western section of Qilian Mountains before the 5.3-magnitude Sunan earthquake. Comparing the geomagnetic Z component of this station with that of Lanzhou and Tianshui geomagnetic units, the results show that the occurrence of the MS3.5 Sunan earthquake basically accords with the periodicity of the seismic activity in the western part of Qilian Mountains, but the precursory data have no obvious projectile anomalies The average daily data of natural electric field, geomagnetic daily amplitude difference and Z component of this station have obvious short-term trend anomalies.