应用趋势面分析法去除流磁观测成果中的区域性变化成分

Application of the Trend Surface Analysis Method to Removing the Regional Variation Components from Mobile Geomagnetic Observation Results

采用相关地磁总强度加密区观测资料,利用趋势面分析方法对监测区岩石圈磁场变化中的区域性成分进行研究和讨论。结果表明,利用趋势面分析方法可以有效确定和去除监测区岩石圈磁场的区域性变化成分,使局部异常成分的空间分布形态更加明确、合理,有助于我们对前兆异常进行识别。

The results of mobile geomagnetic data processing may contain significant trend components, which interfere with the identification of anomalous information, and their removal thus becomes necessary. In this paper, the trend surface analysis method was applied to determine and strip the trend components from mobile geomagnetic data processing results. The results showed that the trend surface analysis method could effectively determine and remove the regional variation components of the lithosphere magnetic field in the monitoring area, and make the spatial distribution of the local anomalous components clearer and more reasonable. This is helpful for the identification of precursory anomalies. The technological ideas adopted in this paper are innovative, and the process of technological treatment is relatively simple, operable, and clear in its physical significance.