Global-scale seismic interferometry: numerical validation of the acoustic correlation integral

Applying seismic reflection imaging on a global scale is hard due to the (locally) sparse source distribution. We approach this problem with seismic interferometry (SI). In this paper, we derive an expression for global-scale SI and test it on a simplified 2D acoustic lossless Earth model. When we use responses from sources placed all around the model, we can reconstruct the full and multiple-free response due to a simulated source at one of the receiver positions. When we miss the responses from near-offset sources, we can still reconstruct the full Green’s function. We currently investigate which events in the Green’s function we can still reconstruct properly when responses from sources in the midand far-offset range are missing.