Surface Wave Analysis Tools

Surface wave analysis is a crucial technique in near-surface geophysics for characterizing the shallow subsurface velocity structure. This method utilizes the dispersive properties of surface waves (primarily Rayleigh waves) to determine shear-wave velocity profiles. Surface wave analysis includes multichannel analysis of surface waves (MASW), spatial autocorrelation (SPAC), and other dispersion-based techniques used in engineering geophysics, earthquake seismology, and environmental studies.

Available Tools

hvsrpy

Maintained
▼
Language: Python
License: GPL-3.0
Institution: Virginia Tech (Joseph P. Vantassel)
Last Updated: 2025

An open-source Python package for performing horizontal-to-vertical spectral ratio (HVSR) processing of microtremor and earthquake recordings. HVSR is a fundamental technique in surface wave analysis for site characterization and determining fundamental site frequencies.

Key Features:

  • Support for multiple data formats (MiniSEED, SAF, MiniShark, SAC, GCF, PEER)
  • Multiple methods for combining horizontal components (geometric-mean, arithmetic-mean, etc.)
  • Lognormal distribution support for site resonant frequency with uncertainty representation
  • Advanced statistical approaches incorporating azimuthal and spatial variability
  • Automated window rejection algorithms with frequency-domain processing
  • SESAME (2004) peak reliability and clarity criteria checking
  • Command line interface (CLI) for batch processing with multiprocessing
  • Direct access to raw HVSR data from each time window and azimuth
  • Extensive validation and comparison with Geopsy software
View on GitHub Documentation

Contributing New Tools

To add a new surface wave analysis tool to this page:

  1. Fork this repository
  2. Edit this file (surface-wave-analysis.md)
  3. Add your tool using the template below
  4. Submit a pull request

Tool Template

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        <strong>Language:</strong> Programming Language
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        <strong>License:</strong> License Type
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        <strong>Institution:</strong> Institution/Author
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        <strong>Last Updated:</strong> Year
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        <li>Feature 2</li>
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    <div class="tool-links">
      <a href="GITHUB_URL" class="btn btn-primary" target="_blank">View on GitHub</a>
      <a href="DOCS_URL" class="btn btn-secondary" target="_blank">Documentation</a>
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