This repository holds the latest version of the ShakeMap code. ShakeMap is a system for rapidly characterizing the extent and distribution of strong ground shaking following significant earthquakes. The code is primarily written in the Python programming language.

To receive updates on ShakeMap please sign up at Gov Delivery. We also encourage requests, questions, and discussions through the Github issues tab associated with this repository. You may contact the developers at shakemap@usgs.gov.

The "quick start" guide, including installation instructions, is included in the wiki:

• https://code.usgs.gov/ghsc/esi/shakemap/-/wikis/home

The ShakeMap documentation is located here:

• https://ghsc.code-pages.usgs.gov/esi/shakemap/

The primary host for the development of this software is on a gitlab instance here:

• https://code.usgs.gov/ghsc/esi/shakemap

One drawback of the gitlab system is that it is more cumbersome for users to create an account and post issues than in github. If you would like to be able to participate on issues in gitlab, please send us a request to register you as a user.

Alternatively, if you have a github account, you can immediately post issues to the mirrored of this repository on github here:

• https://github.com/DOI-USGS/ghsc-esi-shakemap

Softare Release

• Worden, C. B., Hearne, M., and Thompson, E. M. (2018). ShakeMap v4 Software, USGS Software Release. https://doi.org/10.5066/P97FHE0I

Journal Articles

• Wald, D. J. (2023). Alerting the globe of consequential earthquakes. Perspectives of Earth and Space Scientists. https://doi.org/10.1029/2022CN000200
• Wald, D. J., Worden, C. B., Thompson, E. M., & Hearne, M. (2021). ShakeMap operations, procedures, and policies. Earthquake Spectra, 38(1), 756–777. https://doi.org/10.1177/87552930211030298
• Wald, D. J., Quitoriano, V., Heaton, T. H., Kanamori, H., Scrivner, C. W., & Worden, C. B. (1999). TriNet "ShakeMaps": Rapid genera- tion of peak ground motion and intensity maps for earthquakes in southern California. Earthquake Spectra, 15(3), 537–556. https://doi.org/10.1193/1.1586057
• Worden, C. B., Thompson, E. M., Baker, J. W., Bradley, B. A., Luco, N., & Wald, D. J. (2018). Spatial and spectral interpolation of ground motion intensity measure observations. Bulletin of the Seismological Society of America, 108(2), 866–875. https://doi.org/10.1785/0120170201
• Worden, C. B., Wald, D. J., Lin, K., Cua, G., & Garcia, D. (2010). A revised ground-motion and intensity interpolation scheme for ShakeMap. Bulletin of the Seismological Society of America, 100(6), 3083–3096. https://doi.org/10.1785/0120100101