Nice catch Sue.
If the conditions are right there are 3 phases to sunsets when there is
High Cirrus. The first is at sunset when one sees the bright Oranges
followed later by the Red-Orange which you caught. But if the Clouds are
high enough and there are no blocking clouds to the West the 3rd phase
requires a tripod or Very Steady base to photograph when atmospheric
refraction produces a Deep Red on the Clouds which is backed by a deep
Blue/Violet sky and Stars.
Again, Nice Picture.

Crazy Ed