Analytical formulas are derived to compute the first-order effects produced by plane inhomogeneities on the point source seismic response of a fluid-filled stratified porous medium. The derivation is achieved by a perturbation analysis of the poro-elastic wave equations in the plane-wave domain using the Born approximation. This approach yields the Fréchet derivatives of the P -- SV - and SH-wave responses in terms of the Green's functions of the unperturbed medium. The accuracy and stability of the derived operators are checked by comparing, in the time-distance domain, differential seismograms computed from these analytical expressions with complete solutions obtained by introducing discrete perturbations into the model properties. For vertical and horizontal point forces, it is found that the Fréchet derivative approach is remarkably accurate for small and localized perturbations of the medium properties which are consistent with the Born approximation requirements. Furthermore, the first-order formulation appears to be stable at all source-receiver offsets. The porosity, consolidation parameter, solid density and mineral shear modulus emerge as the most sensitive parameters in forward and inverse modeling problems. Finally, the Amplitude-Versus-Angle response of a thin layer shows strong coupling effects between several model parameters.
NuSPAN: A Proximal Average Network for Nonuniform Sparse Model -- Application to Seismic Reflectivity Inversion
Indian Institute of Science (IISc)（印度科学学院）；Department of Electrical Engineering, IISc（印度科学学院电气工程系）；Centre for Earth Sciences, IISc（印度科学学院地球科学中心）；Centre of Excellence in Advanced Mechanics of Materials, IISc（印度科学学院先进材料力学卓越中心）
Mitigation and optimization of induced seismicity using physics-based forecasting
Scripps Institution of Oceanography, University of California San Diego（斯克里普斯海洋学研究所，加州大学圣迭戈分校）；Department of Geological Sciences, San Diego State University（地质科学系，圣地亚哥州立大学）；Institute of Geological Sciences, of Freie Universität Berlin（柏林自由大学地质科学研究所）
Seismic amplitude-variation-with-offset inversion using an algebraically equivalent formulation of the exact Zoeppritz equations and a matrix-free adjoint-state framework
Higher--order gradient modeling of velocity dispersion in tight sandstones with implications to agroseismology
Institut de Physique du Globe de Paris, CNRS, Université de Paris（巴黎地球物理研究所，法国国家科学研究中心，巴黎大学）；Indian Institute of Science Education and Research Kolkata（加尔各答印度科学教育与研究机构）；Department of Mining Engineering, Faculty of Engineering, Tarbiat Modares University（塔比巴特莫达雷斯大学工程学院采矿工程系）；Department of Mathematics and Statistics, Institute of Business Management（商业管理学院数学与统计系）
$\mathbf{\mathbb{E}^{FWI}}$: Multi-parameter Benchmark Datasets for Elastic Full Waveform Inversion of Geophysical Properties
Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；Rutgers University（罗格斯大学）；Colorado School of Mines（科罗拉多矿业学院）；University of Pennsylvania（宾夕法尼亚大学）；The Pennsylvania State University（宾夕法尼亚州立大学）；Microsoft（微软）
