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]

Check out all Research Highlights

What Is happening?

workshop

2022 Annual Business Meeting

November 29, 2022

zoom

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

Updated 1 November 2022 

Webinar

2022-2023 

Thursdays @ 2p PT beginning January 12, 2023

Themes include software, two phase flow, & SZ4D

 

All webinars

Updated 20 October 2022

document

2022 Annual Report

2022 CIG Annual Report [pdf]

Posted: 6 September 2022

document

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

Calypso

v1.2.0
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

PyLith

v3.0.3

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

Rayleigh

v1.1.0

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

SW4

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

Contribute Code

Find out more about contributing software to the community.
 
CIG on Zenodo
 
Join our forum to receive announcements and be part of community discussions. The forum has replaced our mailing lists.