pySLAMMER: a Python package for Seismic LAndslide Movement Modeled using Earthquake Records

Sliding block analysis (SBA) produces displacement indices which are frequently used in earthquake engineering design and risk analysis of landslide hazards. SLAMMER, the widely-used SBA from the USGS, has a GUI that limits modern workflow integration. But because SBA results are index values, continuity with historical analyses is crucial. pySLAMMER performs SBA with verified functional equivalence to SLAMMER, enabling modern programmatic workflows and historical continuity. A correction to SLAMMER’s dynamic response algorithm reduces the complexity from O ( N 2 ) to O ( N ) . pySLAMMER welcomes community contributions and provides a platform for introducing new sliding block methods as extensions of historical models.