For the events with two HXR footpoints, this figure shows the histogram of the HXR flux coming from the footpoint above the sunspot relative to the total flux of the two HXR sources. Values above 0.5 on the horizontal axis mean that the flux is higher in the footpoint directly rooted within the sunspot, and vice versa for values below 0.5. By taking into account the error on the flux estimation, events with values between 0.45 and 0.55 (interval defined by the vertical dashed lines) are considered to have similar HXR fluxes in the footpoints. Of all the events with two footpoints, 59.3% have a stronger HXR flux in the footpoint rooted directly within the sunspot, 18.5% have similar fluxes, and 22.2% have a stronger HXR flux in the footpoint outside the sunspot.