2023年10月19日 · Analogous to optical birefringence, shear waves split into a fast and a slow trave ling component in seismically anisotropic materials (e.g., Silver and Chan,1991).

2021年6月1日 · We use core reflected ScS waves sensitive to a broad region of the core-mantle boundary beneath Hawaii to create the first high-resolution map of the Hawaiian ultralow-velocity zone (ULVZ).

研究表明,远震直达体波波形 (P波、SH波)是有效反演中强地震 (M5.5~7)震源参数的重要资料.但是当震中距较大时,核幔边界全反射波ScS会进入SH波反演窗口,其未被传统的基于体波震源参数反演算法所考虑,从而导致反演结果偏差.本文通过TEL3与fk方法合成理论地震图 ...

Ray paths for seismic waves penetrating the earth and their terminology (Princeton University)

2017年4月26日 · 通过对410-km和660-km间断面深度的探测，可以为了解地幔温压条件、物质组分、岩石圈深俯冲等地球深部动力学问题提供重要途径。 西北太平洋俯冲带北起千岛群岛，中经日本伊豆-小笠原地区，南至马里亚纳群岛，是世界上最典型、最集中的俯冲带（图1a）。 该区域的中深源地震分布及远震体波层析成像结果显示：西北太平洋板片以较低角度 (～30°)俯冲，一直俯冲到我国东北地区 660-km 间断面附近。 受海域台站分布限制，前人研究大都关注太平洋俯冲板片 …

2020年12月17日 · The South China Sea (SCS) is a highly semi-enclosed marginal sea located in the East Asian monsoon region. This paper proposes interesting aspects of the unique feature of the SCS waves in response to tropical cyclone's passage when …

the effect of local heterogeneity on the ScS waveforms. An analysis of synthetics, based on different moment tensor solutions and more complicated wave speed structures, is beyond the scope

A procedure for retrieving the attenuation operator for SH-polarized multiple ScS waves by spectral stacking is outlined. Application of the procedure to 17 multiple ScS phase pairs from 5 western ...

The splitting of ScS phases, which reflect once off the core-mantle boundary (CMB), is commonly measured to identify lowermost mantle anisotropy, although some challenges exist. Here, we use global wavefield simulations to evaluate commonly used approaches to inferring a lowermost mantle contribution to ScS splitting.

In this paper the S wave method of focal mechanism determination is extended to include the ScS wave. By the establishment of the quantitative relationship between the directions of vibration of the S and the ScS, ScS wave data can be reduced to a form of S wave data usable for focal mechanism determinations.