P_diff synthetic bandpass filtered between 0.1 and 1.0 Hz at an epicentral distance of 103.3° with an explosive source at 20 km depth (top panel). Cross-section in the great-circle plane (bottom panel) and map view at 2880 km depth (middle panel) of the amplitude sensitivity kernel for P-wave velocity for a P_diff wave The selected window is shown with red lines on the synthetic.