My research focuses on solid earth structure and environment using seismic tools. Utilizing continuous seismic waveforms, I extract useful information of seismic waves including phase, amplitude and time-lapse variations through seismic interferometry and time-frequency analysis. I adapt and develop new methods including modal summation and adjoint tomography for forward modeling of seismic wave propagation and inversion of subsurface structure and source characteristics. The application of my work includes the imaging of sedimentary basins, volcano magma bodies, and crustal structures, modeling of wavefield scattering at geological boundaries, and waterfall force estimations.