Qinya Liu
Professor of Geophysics
Department of Physics & Department of Earth Sciences
University of Toronto


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  1. Cube2sph: A Toolkit Enabling Efficient and Accurate Continental-scale Seismic Wave Simulations using the SPECFEM3D Package, T.S. Liu, etc. (2022), in preparation.
  2. Systematic uncertainty quantification of first-polarity-based moment tensor inversion due to sparse coverage of sensor arrays in laboratory acoustic emission monitoring, Liang Ding, Edouard Kravchinsky, Afeez K. Popoola, Yusheng Qiu, Sebastian Goodfellow, Qinya Liu, and Giovanni Grassell, in preparation (2022)
  3. Recent progress on adjoint tomography, Hejun Zhu, Qinya Liu, Jidong Yang, Review of Geophysics and Planetary Physics (in Chinese), submitted (2022)
  4. Editorial: Reverse Time Imaging in Solid Earth and Exploration Geophysics, H-W Zhou, Z. Zou, W. Zhang, Q. Liu and H. Hu, Front. Earth Sci. 10:931127. doi: 10.3389/feart.2022.931127 (2022). PDF (Reverse Time Imaging in Solid Earth and Exploration Geophysics Ebook)

  5. Toward waveform-based characterization of slab and mantle wedge (SAM) earthquakes, F. Halppap, S.Rondenay, Q. Liu, F. Millet, L. Ottemoller, 126, e2020JB021573, JGR (2021). PDF
  6. Full-Waveform Inversion of High-frequency Teleseismic Body Waves based on Multiple Plane Wave Incidence: Validation and Practical Applications, K. Wang, Y. Wang, X. Song, P. Tong, Q. Liu and Y.J. Yang, doi:10.1785/0120210094, BSSA (2021). PDF
  7. On-the-fly Full Hessian Kernel Calculations based upon seismic wave simulations, Y.J. Xie, C. Rychert, N. Harmon, Q. Liu, D. Gajewski, doi:10.1785/0220200410, SRL (2021). PDF
  8. Adjoint Tomography of Ambient Noise Data and Teleseismic P Waves: Methodology and Applications to Central California, K. Wang, Y.J. Yang, C.X. Jiang, Y. Wang, P. Tong, T.S. Liu and Q. Liu, Vol 126, No. 6, e2021JB021648, JGR Solid Earth (2021) PDF
  9. New insights into the structural heterogeneity and geodynamics of the Indo-Burma subduction zone from ambient noise tomography, S.C. Wu, J.Y. Yao, S.J. Wei, J. Hubbard, Y. Wang, Y. M. M. Htwe, M. Thant, X. Wang, K. Wang, T.S. Liu, Q. Liu, P. Tong, 562, 116856, Earth and Planetary Science Letters (2021). PDF
  10. Crustal rotation and fluids: Factors for the 2019 Ridgecrest earthquake sequence?, P. Tong, J. Yao, Q. Liu, T. Li, D. Yang, K. Wang, and S. Liu, GRL, 48, e2020GL090853 (2021). PDF

  11. Joint inversion of linear array ambient noise surface-wave and teleseismic body-wave data based on an adjoint-state method, Chao Zhang, Huajian Yao, Ping Tong, Q. Liu, T. Lei, Journal of Geophysics (in Chinese), 63(11): 4065-4079, doi: 10.6038/cjg2020O0181 (2020)
  12. Crustal deformation in southern California constrained by radial anisotropy from ambient noise adjoint tomography, K. Wang, C.X. Jiang, Y.J. Yang, V. Schulte-Pelkum, and Q. Liu, Vol 47, e2020GL088580, GRL (2020). PDF, Final Radially anisotropic Socal Model
  13. Locating microseismic sources based upon L-shaped single-component geophone array: a synthetic study, L. Ding, Q. Liu, E. Gao, W. Qian and S. Sun, 27, 2711-2725, Journal of Central South University (2020). PDF
  14. A generalized cover renewal strategy for multiple crack propagation in two-dimensional numerical manifold method, Changyi Yu, Fei Zheng, Bingchuan Guo, Q. Liu, 27, 2367-2381, Journal of Central South University (2020). PDF

  15. High-frequency seismic wave modeling of deep Earth's interior based on spectral-element simulations and hybrid methods: a conceptual study, Chuangxin Lin, Vadim Monteiller, Kai Wang, Tianshi Liu, Ping Tong, Qinya Liu, Vol 219, No. 3, P 1948-69, GJI (2019). PDF
  16. A coupled NMM-SPH method for fluid-structure interaction problems, Ying Xua, Changyi Yu, Feng Liu, Qinya Liu, Applied mathematical modelling, 16, 446-478 (2019). PDF
  17. Three-dimensional sensitivity kernels for multi-component empirical Greens functions from ambient noise: Methodology and application to adjoint tomography. K. Wang, Q. Liu, and Y. Yang., JGR: Solid Earth, 124, doi:10.1029/2018JB017020 (2019). PDF.

  18. Refined crustal and uppermost mantle structure of southern California by ambient noise adjoint tomography, K. Wang, Y. Yang, P. Tong, P. Basini, C. Tape and Q. Liu., GJI, 215(2), 844-863 (2018). PDF
  19. Reverse-time ray-tracing method for microseismic source localization, L. Ding, E. Gao, Q. Liu, W. Qian, D. Liu, Yang, C., GJI, 214 (3), P2053-72 (2018). PDF
  20. Numerical investigations on mechanical characteristics and failure mechanism of outwash deposits based on random meso-structures using discrete element method, Q. Zhang, W.Y. Xu, Q. Liu, J.L. Shen, L. Yan, J. of Central South University, 24, 2894-2905 (2018). PDF
  21. Linear array ambient noise adjoint tomography reveals intense crust-mantle interactions in North China Craton, C. Zhang, H. Yao, Q Liu, P. Zhang,Y. O. Yuan, J. Feng, and L. Fang, J. Geophys. Res. DOI: 10.1002/2017JB015019 (2018). PDF.

  22. Full-waveform detection of non-impulsive seismic events based on time-reversal methods, E.A. Solano, V. Hjorleifsdottir and Q. Liu, 211, 1396-1413, Geophys. J. Int. (2017). PDF
  23. Fast computation of global sensitivity kernel database based on spectral-element simulations, Sales de Andrade, E. and Liu, Q., Pure and Applied Geophysics, 174, 2733-61 (2017). PDF
  24. Exploring the structures of Earth's Interior and earthquake source mechanisms -- Scientific contributions of seismologist Adam M. Dziewonski (in Chinese), Q. Liu, Y. J. Gu and H. J. Yao, 47(5), 509-517, Scientia Sinica Terrae (2017). PDF
  25. Time-evolving seismic tomography: The method and its application to the 1989 Loma Prieta and 2014 South Napa earthquake area, California, P. Tong, D.H. Yang, D.Z. Li and Q. Liu, 44(7), 3165-75, Geophys. Res. Lett. (2017). PDF
  26. Effective media for transversely isotropic models: with applications to borehole sonic logs, Lin, C., Saleh, R., Milkereit, B. and Liu, Q., Pure and Applied Geophysics, 174(7), 2631-2647 (2017). PDF
  27. A novel non-overlapping approach to accurately represent arbitrary particles for DEM modelling, Zhang, Q., Xu, W., Liu, Q., Wang, W. and Meng, Q.X., J. Cent. South Univ., 24: 190-202 (2017). PDF
  28. Effects of conjugate gradient methods and step-length formulas on the multiscale full waveform inversion in time domain: numerical experiments, Liu, Y.S., Teng, J.W., Xu, T., Badal, J., Liu, Q., and Zhou, B., 174(5), 1983-2006, Pure and Applied Geophysics (2017). PDF
  29. Robust time-domain full waveform inversion with normalized zero-lag cross-correlation objective function, Y.S. Liu, J.W. Teng, X. Tao, Y.H. Wang and Q. Liu and J. Badal, Geophys. J. Int., 209(1), 106-122 (2017). PDF

  30. Anelastic sensitivity kernels with parsimonious storage for adjoint tomography and full waveform inversion, D. Komatitsch, Z. Xie, E. Bozdag, E. Sales de Andrade, D. Peter, Q. Liu, J. Tromp, Geophys. J. Int., Vol 206, No. 1, 1467-1478 (2016). PDF
  31. Constraints on the heterogeneity spectrum of Earth's upper mantle, Nicholas Mancinelli, P. Shearer, Q. Liu, JGR, 121(5), 3703-21 (2016). PDF
  32. Wave equation-based reflection tomography of the 1992 Landers earthquake, Xueyuan Huang, Dinghui Yang, Ping Tong, Jose Badal and Qinya Liu, GRL, 43(5), 1884-1892 (2016). PDF
  33. Acoustic wave-equation-based earthquake location, P. Tong, D.H. Yang, Q. Liu, X. Yang and J. Harris, Geophys. J. Int., 205, 464-478 doi: 10.1093/gji/ggw026 (2016). PDF

  34. Mantle-driven Uplift of Hangai Dome: New Seismic Constraints from Adjoint Tomography, M. Chen, Niu, F.L., Liu, Q. and Tromp, J., 42, 6967-74, GRL (2015). PDF, AGU Blogsphere post and video
  35. Influences of in-situ stress variations on acoustic emissions: a numerical study, Qi Zhao, Nicola Tisato, Giovanni Grasselli, Omid K. Mahabadi, Andrea Lisjak, and Qinya Liu, 203 (2) 1246-1252, GJI (2015). PDF
  36. Multi-parameter adjoint tomography of the crust and upper mantle beneath East Asia - Part I: Model construction and comparisons, Chen, M., Niu, F., Liu, Q., Tromp, J., and Zheng, X., J. Geophys. Res. DOI: 10.1002/2014JB011638 (2015). PDF, Suppl

  37. Dependence of sandpile avalanche frequency-size distribution on coverage extent and compactness of embedded toppling threshold heterogeneity: implications for the variation of Gutenberg-Richter b-value, L.-Y. Chiao and Q. Liu, Nonlinear Processes in Geophysics, 21, 1185-1193 (2014). PDF
  38. A 3-D spectral-element and frequency-wave number hybrid method for high-resolution seismic array imaging, Tong, P., D. Komatitsch, T.-L. Tseng, S.-H. Hung, C.-W. Chen, P. Basini, and Q. Liu Geophys. Res. Lett., 41, 7025-7034, doi:10.1002/2014GL061644 (2014). PDF, Research Spotlight on EOS
  39. Wave-equation based traveltime seismic tomography: I. Method, P. Tong, D.P. Zhao, D. H. Yang, X. Yang and Q. Liu, Solid Earth, 5, 1151-1168 (2014). PDF
  40. Wave-equation based traveltime seismic tomography: II. Application to the 1992 Landers earthquake (Mw 7.3) area, P. Tong, D. P. Zhao, D. H. Yang, X. Yang and Q. Liu, Solid Earth, 5, 1169-1188 (2014). PDF
  41. Numerical simulation of hydraulic fracturing and associated microseismicity using finite-discrete element method, Q. Zhao, A. Lisjak, O. Mahabadi, Q. Liu, G. Grasselli, Journal of Rock Mechanics and Geotechnical Engineering, Vol. 6, 574-581 (2014). PDF
  42. High-resolution seismic array imaging based on a SEM-FK hybrid method, P. Tong, C. W. Chen, D. Komatitsch, P. Basini and Q. Liu, GJI, 197, 369-395 (2014). PDF
  43. Toward real-time regional earthquake simulation II: Real-time Online earthquake Simulation (ROS) of Taiwan earthquakes, S. J. Lee, Q. Liu, J. Tromp, D. Komatitsch, W. T. Liang, and B. S. Huang, JAES, 87, 56-68 (2014). PDF
  44. Spectral-element simulations of elastic wave propagation in exploration and geotechnical applications, L. Zheng, Q. Zhao, B. Milkereit, G. Grasselli, Q. Liu, Earthquake Science, 27(2):179-187 (2014). PDF

  45. Numerical simulation of acoustic emission in rocks using FEM/DEM, G. Grasselli, Q. Zhao, A. Lisjak, and Q. Liu. in Rock Dynamics and Applications - State of the Art, Keynotes in Proceedings of First International Conference on Rock Dynamics and Applications. (2013)
  46. Dynamic simulation of acoustic emission in brittle rocks by two-dimensional finite-discrete element analysis, A. Lisjak, Q. Liu, Q. Zhao, Mahabadi, O., Grasselli, G., 195: 423-443, GJI (2013). PDF

  47. Seismic imaging: From classical to adjoint tomography, Qinya Liu, Yu J. Gu, Tectonophysics, 10.1016/j.tecto.2012.07.006 (2012). PDF

  48. Surface wave sensitivity: Mode summation and adjoint SEM, Ying Zhou, Qinya Liu and Jeroen Tromp, GJI, 187, 1560-1576 (2011).  PDF
  49. Forward and adjoint simulations of seismic wave propagation on unstructured hexahedral meshes, Peter, D., Komatitsch, D., Luo, Y., Martin, R., Goff, L., Casarotti, E., Loher, P.L., Magnoni, F., Liu, Q., Blitz, C., Nissen-meyer, T., Basini, P., Tromp, J., Geophys. J. Int. 186, 721-739 (2011).   PDF
  50. Adjoint centroid-moment tensor inversions, YoungHee Kim, Qinya Liu and Jeroen Tromp, Geophys. J. Int., 186, 264-278 (2011).   PDF
  51. On the visibility of the inner-core shear wave phase PKJKP at long periods, P. M. Shearer, C. A. Rychert, and Q. Liu, Geophys. J. Int., 185, 1379-1383 (2011).   PDF

  52. Near real-time simulations of global CMT earthquakes, Tromp, J., Komatitsch, D., Hjorleifsdottir, V., Liu, Q., Zhu, H., Peter, D., Bozdag, E., McRitchie, D., Friberg, P., Trabant, C., and Hutko, A., Geophys. J. Int., 183, 381-389. doi:10.1111/j.1365-246X.2010.04734.x (2010).   PDF
  53. AAAS News Release, Princeton News
  54. Seismic tomography of the southern California crust based on spectral-element and adjoint methods, Carl Tape, Qinya Liu, Alessia Maggi and Jeroen Tromp, GJI, 180, 433-462 (2010).   PDF

  55. Adjoint Tomography of the Southern California Crust, Carl Tape, Qinya Liu, Alessia Maggi, and Jeroen Tromp, Science, No. 21, Vol. 325, Page 988-992 (2009).   PDF

  56. Finite-frequency Sensitivity Kernels for Global Seismic Wave Propagation based upon Adjoint Methods, Qinya Liu and Jeroen Tromp, GJI, Vol. 174, Issue 1, Page 265-286 (2008)   PDF
  57. Time-reversal location of glacial earthquakes, Larmat, C., Tromp, J., Liu, Q., Montagner, J.-P., J. Geophysics. Res., 113, B09314, doi:10.1029/2008JB005607 (2008).   PDF
  58. Spectral-element and adjoint methods in seismology, Tromp, J., Komatitsch, D., and Liu, Q., Comm. in Comput. Phys, 3, 1-32 (2008).   PDF
  59. Three-Dimensional simulations of seismic-Wave propagation in the Taipei basin with realistic topography based upon the spectral-element method, Lee, S.-J., Chen, H.-W., Liu, Q., Komatitsch, D., Huang, B.S., and Tromp, J., Bull. Seism. Soc. Amer., Vol 98, No. 1, 253-264 (2008).   PDF

  60. Finite-frequency sensitivity of body waves to anisotropy based upon adjoint methods, Sieminski, A., Liu, Q., Trampert, J., and Tromp, J., Geophys. J. Int., 171, 368-389 (2007).   PDF
  61. Finite-frequency Sensitivity of Surface Waves to Anisotropy based upon Adjoint Methods, Anne Sieminski, Qinya Liu, Jeannot Trampert and Jeroen Tromp, Geophysical Journal International, 168, 1153-1174 (2007).   PDF
  62. Finite-frequency Tomography using Adjoint Methods -- Methodology and Examples using Membrane Surface Waves, Carl Tape, Qinya Liu and Jeroen Tromp, Geophysical Journal International, 168, 1105-1129 (2007).   PDF

  63. Finite-frequency Sensitivity Kernels based upon Adjoint Methods, Qinya Liu and Jeroen Tromp, Bulletin of the Seismological Society of America, Vol. 96, No. 6, pp. 2383-2397 (2006). PDF
  64. A Structural (Vp) Model of the Salton Trough, California, and its Implication for Seismic Hazard, Peter Lovely, John Shaw, Qinya Liu, and Jeroen Tromp, Bulletin of the Seismological Society of America, Vol. 96, No. 5, pp 1882-1896 (2006). PDF

  65. Seismic Tomography, Adjoint Methods, Time Reversal, and Banana-Doughnut Kernels, Jeroen Tromp, Carl Tape, and Qinya Liu, Geophysical Journal International, Vol. 160, Issue 1, P195-216 (2005).   PDF

  66. Spectral-Element Moment Tensor Inversions for Earthquakes in Southern California, Qinya Liu, Jascha Polet, Dimitri Komatitsch and Jeroen Tromp, Bulletin of the Seismological Society of America, Vol. 94, No. 5, pp.1748-1761 (2004).  PDF
  67. Simulations of ground motion in the Los Angeles basin based upon the spectral-element method, Dimitri Komatitsch, Qinya Liu, Jeroen Tromp, Peter Suss, Christiane Stidham and John H. Shaw, Bulletin of the Seismological Society of America, Vol. 94, No. 1, pp.187-206 (2004).  PDF


Other writings
  1. In Memoriam: Min Chen (1978-2021), also a short version on AGU in-memoriam Page