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The Peculiarities of the Earth’s Outer-to-Inner Core Transition Zone from the Characteristics of PKIIKP and PKP c-dif Waves
Izvestiya, Physics of the Solid Earth ( IF 0.9 ) Pub Date : 2021-02-19 , DOI: 10.1134/s1069351321010109
O. A. Usoltseva , V. M. Ovtchinnikov , D. N. Krasnoshchekov

Abstract—The structure of seismic wavefield at distances close to antipodal is analyzed using two numerical methods—DSM and AXISEM—for calculating full waveforms. The obtained empirical estimates of the amplitude ratio of PKIIKP and PKIKP phases indicate that the S-wave velocity in the upper 40 km of the inner core may not be higher than 3.1 km/s. The properties of the PKPc-dif waves suggest a lower P-wave velocity in the lower 100 km of the outer core.



中文翻译:

从PKIIKP和PKP c-dif波的特征看地球外-内核过渡区的特殊性

摘要—使用DSM和AXISEM两种数值方法分析了接近对映体的地震波场的结构,以计算完整波形。对PKIIKPPKIKP相的振幅比的经验估计表明,内芯上部40 km中的S波速度可能不高于3.1 km / s。所述的性质PKP C-DIF波提供一个较低的P在下部100公里外芯的-wave速度。

更新日期:2021-02-21
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