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本文讨论了△≥140°的地震衍射波Pdif的走时及振幅、周期。并讨论了识别这一震相的方法,还肯定了763长周期地震仪记录衍射波Pdif的优越性。
In this paper, we discuss the travel time, amplitude and period of the seismic diffraction wave Pdif with △ ≥ 140 °. The method of identifying this phase is also discussed. It also confirms the superiority of 763 long-period seismograph in recording Pdiff.