👋 I’m Dunyu Liu, the computational geoscientist at Institute for Geophysics at the University of Texas at Austin. Welcome to my GitHub space, dedicated to user-friendly, reproducible, reliable, and parallel open-source scientific software in geoscience and beyond.

A major line of my research is physics-based earthquake source, cycle, and ground motion modeling with parallel finite-element method, and their integration with various observations such as paleoseismic and ground motion data.

Applications and associated software include:

• Scenario earthquakes with ground shaking with EQdyna (Duan et al., 2017, GRL; Liu and Duan, 2018, BSSA).
• Multicycle earthquake dynamics integrated with paleoseismic data with EQdyna.2Dcycle for San Andreas Fault (Liu et al., 2022, JGR), and for Altyn Tagh Fault (Liu et al., 2021, Tectonophysics).
• Rate- and state-friction-based earthquake cycles. Refs for 3-D fault with a kink using EQQuasi (Liu et al., 2020, GJI), and for geometrically complex faults with EQdyna and dynamic relaxation (Luo et al., 2020, BSSA).
• Ground shaking over cycles with EQsimu, a computing infrastructure for coupling of sophisticated physics-based modeling modules in earthquake research. Latest SCEC report is HERE.
• Community benchmarks for EQdyna (Harris et al., 2018, BSSA), and for EQQuasi (Jiang et al., 2022, JGR).

Other research lines involve:

• Geodynamics:
  • An analytical and numerical toolset to constrain viscous anisotropy (Liu et al., 2024, GJI) with [FEniCS].
  • Forward/Inverse framework for faulting and joint inversion for material properties (Puel et al., 2022, GJI), (Puel et al., 2024, Sci Adv).
• Interferometic Synthetic Aperture Radar (InSAR):
  • Development of GMTSAR. Latest NSF CSSI poster is HERE.
  • InSAR + finite-element model integration for compliant fault structure (Xu et al., 2023, GRL).
• Planetary modeling:
• Climate modeling:

Philosophy of software development:

• Software development should be driven by scientific questions.
• A clean code passes all the tests, removes duplications, and requires constant refactoring.
• The primary user of your code is very likely yourself. Therefore, write a clean code to free yourself from debugging.

Book recommendations:

• Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin (Amazon Link);
• Refactoring: Improving the Design of Existing Code (2nd Ed.) by Martin Fowlor (Amazon Link);
• Poor Charlie's Almanack: The Essential Wit and Wisdom of Charles T. Munger by Charles T. Munger et al. (Amazon Link) for worldly wisdoms and why I pursue this multidisciplinary approach to research.

📫 Please reach out to me via [email protected] or LinkedIn or X.