Computational Infrastructure
for Geodynamics (CIG)

Community-driven organization advancing Earth science by developing and disseminating software for geophysics and related fields.

Annual Business Meeting - Tuesday November 29

Join us to learn more about past and future activities. November 29, 2022 [register].    •  More Info


Research Highlight

Evolution of SPH simulations

SPH Models of the Moon-Forming Giant Impact

Contributed byScott Hull and Miki Nakajima, University of Rochester

The conventional theory for the origin of the Earth’s Moon is the giant impact hypothesis, which describes an oblique, low-velocity collision between the Earth and a Mars-sized planet, Theia (Canup & Asphaug, 2001). Within this framework, the Moon accretes from a debris disk that is produced by the impact. This model can reproduce the mass, dynamics, and low iron content of the Moon. A well-known weakness of the canonical giant impact hypothesis is that the remnants of Theia’s mantle dominate the disk, which contradicts the strong isotopic similarities between the Earth and Moon that suggest a common material origin if the Theia’s isotopic composition differed from the Earth.

Smoothed Particle Hydrodynamics (SPH) is the numerical method of choice for simulating high-energy astrophysical events such as the giant impact. SPH is a particle method in which ... [full article]

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What Is happening?


2022 Annual Business Meeting

November 29, 2022


Join us to learn more about past and future activities  •  register  •  More Info 

Updated 1 November 2022 



Thursdays @ 2p PT beginning January 12, 2023

Themes include software, two phase flow, & SZ4D


All webinars

Updated 20 October 2022


2022 Annual Report

2022 CIG Annual Report [pdf]

Posted: 6 September 2022


Geochemistry, Geophysics, Geosystems Special Collection

Call for Papers for Frontiers in lithospheric dynamics: bridging scales through observations, experiments, and computations.   •  More Info

Deadline: 23 November 2023

Posted 17 January 2022

Get the Tools


A set of codes for MHD dynamo simulation in a rotating spherical shell using spherical harmonics expansion methods.
Current release: 2017-07-17
GNU GPL v2 or newer license



Finite-element code for dynamic and quasistatic simulations of crustal deformation, primarily earthquakes. and volcanoes
Current release: 2022-10-14
MIT license



A 3-D convection code designed for the study of dynamo behavior in spherical shell geometry. 
Current release: 2022-05-05
GNU GPL v3 or newer license


v3.0 beta

3-D seismic modeling, with a free surface condition on the top boundary, absorbing super-grid conditions on the far-field boundaries, and an arbitrary number of point force and/or point moment tensor source terms. 
Current release: 2012-11-02
GNU GPL v2 or newer license

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