Active source experiment (MASW)

General overview

First introduced by Al-Husseini et al. (1981), Mari (1984), Gabrielset al. (1987), the Multichannel analysis of surface waves was popularized by Park et al. (1999). This technique relies on the recording along a 1D linear profile of seismic signals produced by a controlled source (hammer, vibrator, explosion, etc.) and analysis of surface wave dispersion properties after applying slant-stack or FK transform to the recorded seismic section. In the following tutorial, only the FK transform is used.

Getting ready

• Load files coming from one shot point
• mettre un fichier contenant les donnees

Checking sources and receivers location

• Edit headers if needed
• cross-link avec table, set headers

Description of the MASW toolbox

• difference entre taper et processing window
• HRFK (cross-link avec HRFK de Mathias)
• normalize energy

FK Computing

• computation for one single file and picking of the curve
• alternatives : 1) create a stack file and then compute the FK; 2)compute FK for all shots and then stack the FK maps