Multi-channel Analysis of Surface Waves (MASW) is a non-destructive geophysical tool, one of the seismic methods using surface waves.

It measures travel times and magnitudes of surface wave (typically Rayleigh wave) energy. 1-D or 2-D shear wave velocity profiles of the subsurface are then generated. Based on these velocity profiles 1-D, 2-D, or even 3-D geologic models, constrained by ground truth, are generated.