MASW Survey Using Multiple Source Offsets

Although it is generally known that the active MASW method tends to average out the near-field<br>effect of surface waves through the slant-stack process implicitly incorporated in dispersion imaging and<br>therefore one optimum source offset (X1) is usually employed for a given survey, a long source offset to<br>ensure recording of long wavelengths can sometimes result in a lack of short-wavelength energy due to<br>excessive attenuation and, on the other hand, the use of a short source offset can result in the opposite<br>consequence.