2024年8月19日 · PKP waves are a subset of P-waves (primary waves), which are compressional earthquake waves that travel through the Earth's interior. Specifically, PKP waves are P-waves that have traveled...

At shorter distances, the first leg is represented by a crustal P wave. PcP reflected from the free surface N-1 times; N is a positive integer. For example PcP2 is PcPPcP. (alt:P z P) P reflection from outer side of a discontinuity at depth z; z may be a positive numerical value in km.

2008年12月9日 · Using array analysis on southern California stations we show that these body waves are generated in the ocean from distant storms and propagate deep within the Earth's mantle and core as P, PP and PKP phases. Comparisons with ocean wave hindcast data identify several distinct source regions in both the northern and southern hemispheres.

2015年5月2日 · Precursors to the core phase PKP are generated by scattering of seismic energy from heterogeneities in the mantle. Here we examine a large global data set of PKP precursors in individual seismograms and array data, to better understand scattering locations.

1995年6月10日 · Many core phase data are left out of these constructions, e.g., PKP differential travel times, amplitude ratios, and waveforms. This study is an attempt to utilize this additional information to construct a model of core P wave velocity which is consistent with the different types of core phase data available.

PKiKP waves (reflections from the inner core) are traceable in this data sample back to 106". The result is consistent with a sharp inner core boundary at 1220km radius.

PKiKP waves (reflections from the inner core) are traceable in this data sample back to 106°. The result is consistent with a sharp inner core boundary at 1220 km radius.

短周期P波主要包括直达P波、地表反射PP波和地核PKP系列震相，PcP、ScP类震相受反射衰减及纵横波转换的影响，能量较弱 (Astiz et al., 1996； Gerstoft et al., 2008； Li et al., 2020). 图 4 给出了基于IASPEI模型 (Kennett and Engdahl, 1991)获取的体波震相的距离-慢度曲线 (Gerstoft et al., 2008； Wang et al., 2018a).可以看出，P和PKP震相的慢度以4.45 s·deg -1 为界.前者主要包括P和PP，其慢度范围基本一致；后者主要包括PKPdf、PKPbc和PKPab，其慢度以2.0 s·deg -1 …

2015年4月14日 · We apply this method to study the inner core's Western hemisphere beneath South and Central America using paths travelling in the quasi-polar direction between 140 and 150° epicentral distance, which enables us to measure PKiKP–PKIKP differential traveltimes up to greater epicentral distance than has previously been done.

P waves with steeper take‐off angles at the source are either reflected from the core‐mantle boundary (PcP) or refracted into the core (PKP). The refracted PKP waves have a relatively complex pattern of propagation in the core.