Qinya Liu is the J. Tuzo Wilson Professor of Geophysics at both Department of Physics and Department of Earth Sciences at University of Toronto. Her research focuses on applying seismic methods to characterize subsurface structures and seismic sources across multiple scales (i.e., global, regional, exploration and laboratory scales). Her group is involved in the development of spectral-element methods (SEM) for seismic wave simulations and has applied full-waveform inversions to continental-scale structures based on both earthquake data and novel datasets such as ambinent noise and telseismic scattered waves. Her group also works on developing moment-tensor inversion methods for earthquakes and nuclear explosions based on heterogeneous background models, and has recently ventured into source characterization of induced earthquakes, microseismic events and laboratory acoustic emission.