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    • Geopsy is an open-source geophysical analysis software package, which can be used for quick HVSR analysis and is available at geopsy.org.

Active Source Surface Wave Testing

The multi-channel analysis of surface waves (MASW) is a non-invasive seismic geophysical method aimed at the characterization of the small strain stiffness of the near surface (i.e., shear wave velocity), using the disperse nature of surface waves to drive an inversion analysis. 

Guideline Documents:

Procedure Active Source Surface Wave Testing Fieldwork (Download PDF)

    • Guidelines and recommendations to conduct MASW field testing using Geometrics Geode data acquisition systems and a linear array of 4.5 Hz geophones.

Procedure HVSR Processing (To Be Added)

    • Guidelines and recommendations for surface wave testing dispersion analysis.

Datasheet HVSR (To Be Added)

    • Recommended HVSR datasheet for use in the field to record and track important testing details and aid in the development of metadata descriptions.

Processing Tools and Software:

To be added.