Simulation and Parameter Estimation in Geophysics

An open source python package for simulation and gradient based parameter estimation in geophysical applications.

Geophysical Methods

Contribute to a growing community of geoscientists building an open foundation for geophysics. SimPEG provides a collection of geophysical simulation and inversion tools that are built in a consistent framework.

Gravity
Magnetics
Direct current resistivity
Induced polarization
Electromagnetics

Time domain
Frequency domain
Natural source (e.g. Magnetotellurics)
Viscous remanent magnetization

Richards Equation

Forward Simulations

Finite volume tools that work across many different discretizations and dimensions. Simulate your geophysical method in 1D, 2D, 2.5D, 3D and through time. Refine around areas of interest using an OcTree.

Tensor mesh
OcTree mesh
QuadTree mesh
Logicaly rectangular mesh
Cylindrical mesh

Access to derivatives
Plotting utilities
VTK export

Inversion Components

The SimPEG inversion framework is modular, allowing you to explore, experiment and iterate over a variety of approaches to the inverse problem.

Optimization
Regularization
Data misfits
Parametric models
Joint inversions

🚀 Get Started 🚀

The easiest way to install SimPEG is from PyPI, using pip. If you get stuck or have no idea what a pip is, jump on Mattermost or Discourse to ask the community a question!!

📢 Contacting Us 📢

Please don't hesitate to reach out and ask a question! We love to hear about how people are using or want to use SimPEG!

Sign up for the newsletter
Join the community forum on Discourse
Send us a message on Mattermost
Contact us on GitHub by creating a new issue
Join a weekly meeting organized on Mattermost or see previous meetings on YouTube

🙌 Contribute 🙌

SimPEG is a community of scientists and volunteers who are excited to help you out, please give back to the community by sharing your successes and citing the project! Here are some ways you can contribute:

Talk about SimPEG, share links on social media, show our logo in your talks
Cite the papers and project (see below)
Submitting bugs when things don't work
Fix typos and add examples to the documentation
Contribute some code

SimPEG Framework Paper


            Cockett, Rowan, Seogi Kang, Lindsey J. Heagy, Adam Pidlisecky, and Douglas W. Oldenburg. "SimPEG: An Open Source Framework for Simulation and Gradient Based Parameter Estimation in Geophysical Applications" Computers & Geosciences, September 2015. doi:10.1016/j.cageo.2015.09.015.

Electromagnetics Simulations & Inversions


            Lindsey J. Heagy, Rowan Cockett, Seogi Kang, Gudni K. Rosenkjaer, Douglas W. Oldenburg. "A framework for simulation and inversion in electromagnetics" Computers & Geosciences, September 2017. doi:10.1016/j.cageo.2017.06.018

Project Ecosystem

SimPEG is an ecosystem with many interrelated projects and repositories.

simpeg

Simulation and inversion utilities for many different geophysical methods.

simpeg/simpeg
https://docs.simpeg.xyz
Stable, but changing

discretize

Finite volume and visualization programs for solving and inverting PDEs.

pymatsolver

A sparse matrix solver for Python. Solving Ax = b should be easy.

geoana

A collection of mostly analytic functions in geophysics.