Longtime EERI member W. D. Liam Finn (M.EERI 1976), an Emeritus Professor at the University of British Columbia (UBC) and a leader in the field of geotechnical earthquake engineering, passed away on December 24, 2025. Over a career spanning more than five decades, Dr. Finn reshaped the discipline through pioneering research, transformative teaching, and a lifelong commitment to advancing seismic resilience of communities around the world. He received the George W. Housner Medal, EERI’s highest honor, in 2019.
Professor Finn’s contributions touched every major facet of geotechnical earthquake engineering. His work advanced the understanding of ground motions, site response, liquefaction, constitutive modeling, numerical analysis, soil–structure interaction, laboratory testing, and performance-based design. His landmark achievement, the development of an effective stress–based constitutive model for dynamic analysis, revolutionized how engineers simulate pore pressure generation and liquefaction under cyclic loading. This breakthrough provided the first practical framework for effective stress dynamic analysis of earth structures and remains a cornerstone of modern seismic design. Through its implementation in widely recognized 1D and 2D computer programs, Dr. Finn demonstrated the power of the model and applied it to the retrofit of existing and new infrastructures. His pioneering work paved the way for the models and methods now used in seismic design and retrofit projects around the world.
Dr. Finn graduated from the National University of Ireland in 1954 with a B.Eng. in Civil Engineering, and received his M.Sc. and Ph.D. from the University of Washington in Seattle in 1957 and 1960 respectively. At UBC, he founded Canada’s first geotechnical earthquake engineering, and later served as Head of Civil Engineering and Dean of Applied Science. In 1999, he was appointed the first Anabuki Professor of Foundation Geodynamics at Kagawa University, Takamatsu, Japan. Professor Finn was a gifted educator and mentor. He inspired generations of students, many of whom now lead research programs, shape seismic design codes, and design major infrastructure across the world.
Dr. Finn’s awards, medals, and scholarly contributions, including more than 400 papers, are too numerous to list. In addition to the Housner Medal, he was awarded the Canadian Geotechnical Society (CGS)’s Legget Medal in 2011 and the ASCE's H. B. Seed Medal. A symposium was held in his honor in the United States in 2001 as part of the International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. Most recently, the Vancouver Geotechnical Society (VGS) hosted a Legacy Lecture in November celebrating his life and contributions.
Those who knew him speak just as often of his warmth, humility, and friendship. He welcomed students from around the world, supported colleagues with kindness, and carried himself with a rare blend of brilliance and humanity. His legacy lives not only in the models we use and the codes we follow, but in the people he taught, mentored, and inspired. His impact will continue to resonate for decades to come.
Thank you to Thava Thavaraj of the British Columbia Regional Chapter for contributions to this obituary.
