DynCFS · computational seismology
Compute static and dynamic Coulomb failure stress changes from finite-fault models, with explicit source, receiver, time and stress conventions.
``` ::::{grid} 1 1 3 3 :gutter: 3 :::{grid-item-card} Run a small calculation :link: quickstart :link-type: doc Prepare one source patch and three receivers, build a static library and plot CFS. ::: :::{grid-item-card} Configure your model :link: configuration :link-type: doc Understand the INI sections, receiver modes, library coverage and dynamic backends. ::: :::{grid-item-card} 中文入门 :link: zh/index :link-type: doc 安装程序、运行小算例，并核对应力单位和结果目录。 ::: :::: ## A complete workflow 1. **Describe the rupture.** Supply patch geometry, slip, seismic moment and source time functions. 2. **Define the receivers.** Use observation faults or a geographic grid at a fixed depth. 3. **Build a library.** Match the Earth model, depth and distance coverage to the calculation. 4. **Resolve the stress.** Use a fixed mechanism, an optimized rake, or optimally oriented planes. 5. **Inspect the result.** Check tensor components, units, sampling and static–dynamic consistency. DynCFS calls [pygrnwang](https://github.com/Zhou-Jiangcheng/pygrnwang) for Green's-function preparation and synthesis. The current source uses **EDGRN2/EDCMP2** for static stress, **QSEIS2025** for layered dynamic calculations and **QSSP2020** for spherical dynamic calculations. These pages describe the **3.0.0** source tree on the `main` branch. Python support is declared as 3.9 or newer; the documentation build uses Python 3.12. Read the [scientific conventions](conventions.md) before interpreting stress signs or comparing outputs. ```{toctree} :maxdepth: 2 :caption: Getting started installation quickstart zh/index ``` ```{toctree} :maxdepth: 2 :caption: User guide configuration input-files conventions guides/index cli ``` ```{toctree} :maxdepth: 2 :caption: Earthquake examples cases/wenchuan cases/ludian ``` ```{toctree} :maxdepth: 2 :caption: Reference and development api/index validation development references ```