Seismic interferometric imaging from a point source in the ground

Shiraishi, Kazuya*; Matsuoka, Toshifumi*; Matsuoka, Toshiyuki; Tanoue, Masayoshi*; Yamaguchi, Shinji*

Seismic interferometry can reconstruct reflection responses by means of cross-correlation of transmission responses on the surface. An advantage of this method is that one can simulate as many shot records as the number of receivers with only one data set. We applied this method to reverse VSP data acquired by one explosive source in the subsurface at a civil construction site in Mizunami, Japan. From the observed transmission records, shot gathers are reconstructed applying cross-correlation, and following data processing including poststack migration we obtain a two-dimensional subsurface image. This section is clear enough to evaluate subsurface structures.