Below is a picture of a typical sunset that I have been observing lately at an undisclosed location in the Southern Hemisphere:
Given that the base of the picture is parallel to sea level, you can see that the line where the dark blue meets the red in the sky, is on an angle of elevation of approximately 7 - 8 degrees.
Is there an explanation for this phenomenon (which I have observed for the past few days) and is it related to my position on the Earth, or the time of year?