Seismic Forward Modeling Program with MATLAB Implementation

This seismic forward modeling program utilizes MATLAB to simulate seismic wave propagation through subsurface geological structures. The implementation employs finite-difference time-domain (FDTD) methods to solve wave equations, making it particularly valuable for students and professionals in geophysics, seismology, and earthquake engineering. The MATLAB codebase leverages matrix operations and partial differential equation solvers to model various wave types including compressional P-waves, shear S-waves, and surface waves. Key functions handle velocity model initialization, boundary condition implementation (such as absorbing boundaries via PML layers), and wavefield snapshot generation. The program features an interactive GUI built using MATLAB's App Designer, enabling parameter configuration through dropdown menus and slider controls. Users can modify source characteristics, velocity distributions, and observation parameters through structured input dialogues. The code implements staggered-grid spatial discretization and recursive time stepping algorithms for stable wave propagation simulation. Wave propagation modules include isotropic elastic wave propagation with configurable source mechanisms. The visualization component generates time-lapse wavefield displays using MATLAB's image processing and graphics capabilities, allowing users to observe wave interference patterns and amplitude variations. This educational tool demonstrates core seismic modeling concepts through well-commented code structure, making it accessible for beginners while maintaining professional-grade simulation accuracy. The modular design facilitates customization of propagation media properties and source-receiver geometries for specific research applications.