Download scientific diagram | Shear‐wave velocity (VSV and VSH) models for different grid cells representing the major sub‐regions of northwestern DVP. The averaged VSV and VSH models for...

2021年4月5日 · The radial seismic anisotropy was computed by percentage difference between Vsh and Vsv: γ = (Vsh − Vsv)/Vs. One-dimensional recovery test assigning a small value of 3% radial anisotropy and high velocity in the upper mantle demonstrates that the observed shear-wave velocity and radial anisotropy are robust (Fig. S3).

2012年6月8日 · The numerical results show that experimental data agree well with the first model: at high frequency, Vp/Vs ratios range from 1.6 to 1.8 in the dry case and from 1.6 to 2.2 in the saturated case. The second model predicts both Vp/Sv and Vp/Sh to vary from 1.2 to 3.5, depending on the raypath angle relative to the crack fabric.

2015年6月19日 · Maps of radial anisotropy in the crust and upper mantle. Positive radial anisotropy is for Vsh > Vsv, and negative anisotropy is for Vsh < Vsv.

Significant radial anisotropy with Vsh>Vsv is present under most cratons in the depth range 250-400 km, similar to that reported earlier 9,10 at shallower depths (80-250km) under ocean basins.

The transition zone exhibits localized anisotropic anomalies of ∼3 per cent vSH > vSV beneath North America and the Northwest Pacific and ∼2 per cent vSV > vSH beneath South America.

2017年8月1日 · In most models, there is an indication of an increase in anisotropy in D″, with Vsh> Vsv (ξ slightly larger than 1), although there is variability among models, due to a combination of parametrization, types of seismic waves considered, and theoretical assumptions.

2024年8月28日 · 径向各向异性和 VSiso 分别通过获得的 VSH 和 VSV 的差异和平均来确定。 重力建模与表面波分析一起用于了解该地区的复杂地质，揭示对上-中-下地壳边界、地下结构和 Moho 深度的见解。

In this study we analyze which are the information that we can get from the measure of the VSv/VSh ratio, obtained from the separate VSv and VSh tomographic images, in case of weak anisotropy. To this purpose, we used the ray-based tomography, which exploits the ray-tracing method to obtain the velocity field, and through which we can know the ...

2022年12月1日 · For this purpose, we used the travel time tomography to obtain the two velocity fields (V SV and V SH) and to exploit the computed ray paths from which we can know the directions of each ray...