This Python module enables modeling of frictional response to dynamic events such as velocity steps and time dependent frictional healing. The rate and state framework was laid out in Dieterich (1979), and furthered by Ruina(1983). A summary article by Chris Marone (1998) provides a solid background.

Examples of simple single state variable and more complex multiple state-variable cases are included in the examples directory.

• Dieterich, J. H. (1979). Modeling of rock friction: 1. Experimental results and constitutive equations. Journal of Geophysical Research: Solid Earth (1978--2012), 84(B5), 2161–2168.
• Marone, C. (1998). Laboratory-derived friction laws and their application to seismic faulting. Annual Review of Earth and Planetary Sciences, 26(1), 643–696.
• Ruina, A. (1983). Slip instability and state variable friction laws. Journal of Geophysical Research: Solid Earth (1978--2012), 88(B12), 10359–10370.