A study of multi-mode conversions in the Blackfoot 3C seismic Data

Han-xing Lu, Gary F. Margrave

After conventionally processing the vertical and radial components, data from the 3-C Blackfoot survey was re-processed using various flows (P-P, P-S, S-P and S-S). It was found that different energy types exist in the vertical and radial components, some of which are quite strong, while others are comparable in amplitudes to background noise. This indicates that there are multiple wave mode conversions at the earth's surface and at every interface with an impedance contrast.