Locating VSP Diffracted Arrivals

Diffracted arrivals from geological discontinuities in the vicinity of the borehole are often seen in Vertical Seismic Profile (VSP) datasets and appear as locally coherent events. For simple VSP configurations there is not usually sufficient data to migrate the diffractions to a sharp image. Simple location methods often have to be utilised. The use of one micro-seismic processing technique is investigated as a way of locating diffraction sources using a real VSP example.