pyslammer 0.2.3

Python code for calculating sliding block displacements.

pySLAMMER

pySLAMMER (Python package for Seismic LAndslide Movement Modeled using Earthquake Records) is a tool for estimating the co-seismic displacements of landslides with rigid and flexible sliding-block analyses. The package name and code are based on the USGS tool SLAMMER¹.

Features

• Rigid sliding block analysis
• Decoupled flexible sliding block analysis
• Coupled flexible sliding block analysis
• Built-in sample earthquake ground motion records
• Visualization tools for analysis results
• Verified against the original USGS SLAMMER

Installation

pip install pyslammer

Quick example

import pyslammer as slam

# Load a sample ground motion record
motions = slam.sample_ground_motions()
gm = motions["Imperial_Valley_1979_BCR-230"]

# Run a rigid sliding block analysis
ky = 0.2  # yield acceleration in g
result = slam.RigidAnalysis(ky, gm)

print(f"Sliding displacement: {result.max_sliding_disp:.3f} m")

Documentation

Please see the documentation for the quickstart guide, examples, API reference, and technical manual.

How to cite

Please include citations for both the pySLAMMER code and software paper if you use pySLAMMER.

Code:

Arnold, L., & Garcia-Rivas, D. (2025). Pyslammer (Version v0.2.2) [Python]. Zenodo. https://doi.org/10.5281/zenodo.15385355

Software paper:

Pending (manuscript in review)

License

pySLAMMER is licensed under the GNU General Public License v3.0.

1. Jibson, R.W., Rathje, E.M., Jibson, M.W., and Lee, Y.W., 2013, SLAMMER—Seismic LAndslide Movement Modeled using Earthquake Records (ver.1.1, November 2014): U.S. Geological Survey Techniques and Methods, book 12, chap. B1, unpaged. https://pubs.usgs.gov/tm/12b1/ ↩