f An application of 2D acoustic datuming - Data conditioning before wave separation

2D filtering methods applied to surface seismic data give unsatisfactory results when strong discontinuous shallow events interfere with deep much weaker reflecfions. 2D acoustic datuming equivalent to a forward extrapolation can create a seismogram where events are coherent, consequently conditions for wave separation by 2D filtering methods become appropriate. The method is illustrated by a common VP gather acquired on outcropping volcanics in the Great Basin in Nevada.