Chromospheric IBIS CP (upper left) and I_core (upper right) power maps within the 4 − 10 mHz range. The two boxes on the CP map indicate where spectral averaging has been performed to derive the results shown in the middle panels. The black contour on the I_core map represents the CP power contour where strong magnetic wave power is detected. Plots of the CP (middle top) and I_core (middle bottom) wave power averaged across the two boxes drawn in the upper left panel. For completeness, also shown are the spectral averaging for the blue dot locations (green plots). The SDO/HMI velocity 5.5 − 7.5 mHz amplification map with respect to the quiet sun velocity power is displayed in the lower panel. The contour represents the penumbra boundary. The dotted white box on the SDO/HMI velocity amplification map (for 5.5 − 7.5 mHz) indicates the IBIS FOV.