Clawpack Community

We welcome new users!

We also welcome new contributors; see Developers’ Guide for tips on contributing code or new examples.

If you run into problems or can’t find the answer to your question in these docs, please send a note to the claw-users google group.

We have adopted the NumFOCUS Code of Conduct. Please see that page for more information.

Bug reports and suggested improvements

If you find a bug or want to suggest an improvement, please raise an issue on the appropriate GitHub repository, for example:

• https://github.com/clawpack/clawpack/issues for general Clawpack issues,

• https://github.com/clawpack/doc/issues for documentation issues,

• https://github.com/clawpack/visclaw/issues for visualization issues,

• https://github.com/clawpack/pyclaw/issues for PyClaw,

• https://github.com/clawpack/classic/issues for the classic code,

• https://github.com/clawpack/amrclaw/issues for AMRClaw,

• https://github.com/clawpack/geoclaw/issues for GeoClaw,

• https://github.com/clawpack/clawutil/issues for clawutil (utility functions).

We welcome new contributors and developers!

See Clawpack Community Photos for some photos of the team.

The pages below give some tips for those who want to get involved.

• Contributing examples and applications for ideas on how to make applications or examples you’ve developed available to other users.

• Developers’ Guide for instructions on how to clone the git repositories, create your own forks, issue pull requests, etc.

• Join or browse the claw-dev google group to track discussion on the code.

User Workshops, Clinics, and Tutorials

Available for streaming

• The Clawpack youtube channel now has several videos on aspects of GeoClaw. Additional introductory videos on Clawpack more generally will be added.

• Tsunamis, Landslides and Asteroid Impacts: GeoClaw Models Deadly Flows, 2025 Simons Foundation article on GeoClaw, accompanied by a couple of videos.

• The GeoClaw software and tsunami modeling Webinar for CSDMS in 2019 by Randy LeVeque

• A set of 25 videos on material from the book Finite Volume Methods for Hyperbolic Problems were recorded in 2023 and are available in this playlist. For a summary of the contents of each video, see this webpage.

Upcoming

No events currently planned.

Recent

• Tutorial on GeoClaw and D-Claw at the CSDMS Annual Meeting in May, 2024. This was not recorded, but some of the teaching materials are available in this Github repository. including this Jupyter notebook on Sample results for Quillayute River flooding

• GeoClaw webinars and user help sessions as part of the 2020 CSDMS Annual Meeting took place online due to COVID-19, on May 22, 2020. Four short presentations can be found on the Clawpack youtube channel. For titles and links to related slides and resources, see the workshop webpage.

• Tutorial on storm surge modeling with GeoClaw, Tulane University, as part of the Clifford Lectures, April, 2017.

• Minisymposterium on Clawpack and GeoClaw at at the SIAM CSE 2017 Conference, February/March, 2017.

• Clinic at the CSDMS Annual Meeting in Boulder, CO, May 2016.

• Minisymposterium on Clawpack Development, Extensions and Applications at the SIAM CSE 2015 Conference

Developer Workshops and Sprint Sessions

Upcoming

Please join us at one of the upcoming sessions, or help plan one elsewhere…

• A Clawpack Developers Workshop is tentatively scheduled October 6-8, 2025, following the 5th Biennial Meeting of SIAM Pacific Northwest Section.

Previous

See the links below for summaries of some projects that have been tackled (and/or are still work in progress).

• GeoClaw Developers Workshop held following the CSDMS Annual Meeting, University of Colorado, May 16-18, 2025.

• GeoClaw Developers Workshop at the Flatiron Institute Center for Computational Mathematics, November 8-11, 2023.

• GeoClaw Developers Workshop held via Zoom in conjunction with the CSDMS Annual Meeting, May 22-23, 2020.

• GeoClaw Developers Workshop, May 25-28, 2018, at the Univesity of Colorado, immediately following the CSDMS Annual Meeting.

• Developers’ workshop at the University of Washington, August 2016.

• Developers’ workshop at the University of Utah in 2015, following the SIAM CSE Conference.

• \([HPC]^3\) workshops at KAUST in 2011, 2012, 2014

• Claw-Dev workshop at UW in 2013

Clawpack Swag and Logos

• Clawpack swag is now available! More coming soon we hope, also with the new GeoClaw logo.

• See Clawpack Logos for more versions and a zip file of logos.