Overall Procedure of MASW Survey
The common procedure for (1-D, 2-D, and 3-D) MASW surveys usually
consists of three steps (Fig. 1):
A 2-D (surface and depth) Vs map is then constructed through an
appropriate interpolation scheme (Fig. 2) by placing each 1-D Vs profile at
a surface location corresponding to the middle of the receiver line. A
more detailed description including optimum parameters can be found in
the following links.
Field Procedure for Data Acquisition
Dispersion Analysis
Inversion Analysis
The common procedure for (1-D, 2-D, and 3-D) MASW surveys usually
consists of three steps (Fig. 1):
- Data Acquisition---acquiring multichannel field records (commonly
called shot gathers in conventional seismic exploration) - Dispersion Analysis---extracting dispersion curves (one from each
record) - Inversion---back-calculating shear-wave velocity (Vs) variation with
depth (called 1-D Vs profile) that gives theoretical dispersion
curves closest to the extracted curves (one 1-D Vs profile from
each curve).
A 2-D (surface and depth) Vs map is then constructed through an
appropriate interpolation scheme (Fig. 2) by placing each 1-D Vs profile at
a surface location corresponding to the middle of the receiver line. A
more detailed description including optimum parameters can be found in
the following links.
Field Procedure for Data Acquisition
Dispersion Analysis
Inversion Analysis
| Fig. 1. Common procedure for MASW surveys for 1-D, 2-D, and 3-D Vs mapping. |
Fig. 2. Illustration to describe the procedure for 2-D Vs mapping.
| Data Courtesy of the Kansas Geological Survey |
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