eGSIM is a web service and Python library for selecting and testing ground shaking intensity models (GSIM), developed by the GFZ in the framework of the Thematic Core Services for Seismology of EPOS under the umbrella of EFEHR

<p align="middle"> <a title='EFEHR' href='https://www.efehr.org'><img height='50' alt='efehr' src='https://www.efehr.org/export/system/modules/ch.ethz.sed.bootstrap.efehr2021/resources/img/logos/efehr.png'></a> &nbsp; <a title='GFZ' href='https://www.gfz.de/'><img height='50' alt='gfz' src='https://media.gfz-potsdam.de/gfz/wv/media/pic/logo/2025_GFZ-Wortbildmarke-EN-Helmholtzdunkelblau-RGB.jpg'></a> &nbsp; <a title='EPOS' href='https://www.epos-eu.org/'><img height='50' alt="eops" src='https://www.epos-eu.org/themes/epos/logo.svg'></a> <br> </p>

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The web portal and API documentation is available at:

https://egsim.gfz.de

Citation

Software

Zaccarelli, Riccardo; Weatherill, Graeme (2020): eGSIM - a Python library and web application to select and test Ground Motion models. GFZ Data Services. https://doi.org/10.5880/GFZ.2.6.2023.007

Research paper

Riccardo Zaccarelli, Graeme Weatherill, Dino Bindi, Fabrice Cotton; Ground‐Motion Models at Your Fingertips: Easy, Rapid, and Flexible Analysis with eGSIM. Seismological Research Letters 2026; doi: https://doi.org/10.1785/0220250228

Web Service

• Web portal: https://egsim.gfz.de
• API Documentation: https://egsim.gfz.de/api_doc
• API Usage (Python): https://github.com/rizac/egsim-client.
  • Jupyter notebook examples (Python): https://github.com/rizac/egsim-client/tree/main/notebook

Python library

eGSIM can also be installed and used as a Python package under specific Python versions and OSs (see below) according to OpenQuake compatibilities.

This approach bypasses the web API and, while requiring a steeper learning curve to directly call core functions (see source code or the Library functions reference for details), allows local execution on the CPU with greater control over optimization.

Installation

Clone repository

Select a root directory and clone eGSIM into it:

git clone https://github.com/rizac/eGSIM.git

this will create the eGSIM directory. Move into it (cd eGSIM)

Create and activate a Python virtual environment (virtualenv)

Move to whatever directory you want (you can use the eGSIM repo directory, as long as you create your virtualenv inside .env or .venv directories, which are ignored by git), and then:

python3 -m venv .venv/egsim  # replace ".venv/egsim" with your path

Activate virtualenv:

source .venv/egsim/bin/activate  # replace ".venv/egsim" with your path

(to later deactivate the virtualeanv, simply type deactivate on the terminal)

Install eGSIM

IMPORTANT: From now on, all following operations must have the virtualenv activated FIRST and assume you cd into eGSIM repository (If not the case, adjust paths accordingly)

Linux

• Python 3.11

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py311-linux64.txt && pip install .
  

• Python 3.12

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py312-linux64.txt && pip install .
  

MacOs

• Python 3.11

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py311-macos_arm64.txt && pip install .
  

• Python 3.12

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py312-macos_arm64.txt && pip install .
  

<details> <summary>Older MacOs (discontinued)</summary>

• Python 3.11

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py311-macos_x86_64.txt && pip install .
  

• Python 3.12

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py312-macos_x86_64.txt && pip install .
  

</details>

Windows

• Python 3.11

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py311-win64.txt && pip install .
  

• Python 3.12

  python -m pip install --upgrade pip setuptools wheel && pip install -r ./requirements/requirements-py312-win64.txt && pip install .
  

Run tests (optional)

(remember to pip install pytest first)

pytest -vvv ./tests/smtk

Usage.

See the Library functions reference