15 Q U AL I T É GÉ OP HYSIQ UE APP LIQ UÉE 1 Shear velocity measurement in boreholes 3 C. Vergniault, J.-L. Mari 1.1 Context 1.1.1 Overview of invasive and non-invasive V s measurements Measurement of shear waves (S) can be invasive (borehole seismic surveys and logging) or non-invasive (surface waves (Multi analysis of surface waves: MASW) and ambient noise (Ambiance measurement vibration: AMV)). Obviously, each method has advantages and disadvantages that the project manager (client or subcontractor) must evaluate to select the most suitable method for the project. To assist in this process, Table 1.1 summarizes the pros and cons of each method. This chapter of Well seismic surveying and acoustic logging is published under Open Source Creative Commons License CC-BY-NC-ND allowing non-commercial use, distribution, reproduction of the text, via any medium, provided the source is cited. © EDP Sciences, 2018 DOI: 10.1051/978-2-7598-2263-8.c003