Gempy is an open-source library for modeling geology written in Python. The library is capable of creating complex 3D geological models including structures, fault networks, and unconformities and it can be coupled with uncertainty analysis.

Hatarilabs have developed an online platform to create geological models with Gempy with minimal effort. The online tool is called GempyApp and runs under AquiferApp (aquifer.hatarilabs.com). This tutorial shows an applied example of geologic modeling of 4 layers with a fault. The tutorial covers the steps of point and orientation file input, definition of fault/strats and geological sequence, show data stats and tables, run the geological model interpolation and plot results.