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震中距大于105°的地震称之为极远震。这时,地震波射线在地球内部所走的路径、记录图上出现的震相类别和记录特征,都回然不同于近震和远震;相应地在处理资料的方法上也应有所不同。从震图分析和解释学的角度来看,极远震较难;对单台而言,尤其如此。对单台报告逐月进行的统计表明,漏分错分这类差错发生率最高的就是极远震部分。究其原因,一方面,
Earthquakes greater than 105 ° epicenter are called extreme earthquakes. At this time, the path traveled by the seismic waves inside the Earth, the types of seismic facies recorded on the record, and the recording characteristics are all different from those of near earthquakes and teleseismic records. Correspondingly, the method of processing data should also be different. From the point of view of seismic map analysis and hermeneutics, it is more difficult for extreme earthquakes; this is especially true for a single station. A monthly report on a single report shows that the most frequent occurrence of misclassifications such as mispriming is the extreme earthquake component. The reason, on the one hand,