Partly Cloudy
Explanation of the Image...

Partly Cloudy
This image, illuminated by the escape time algorithm, is created from the mathematical system defined by the expression z←z*z+c where z and c are complex numbers. The ← symbol signifies the iteration operation. The number z is the single state variable and the number c marks the place in the complex plane where the iteration begins. The map of all possible states for this system is just the complex plane. The domain of this image in the map of possible states is:
(-0.5719145, 0.4948602)/(-0.5673707, 0.4794408)
The depth of iteration is 200.

The only difference between this image and the Mostly Cloudy image is the depth of iteration, being 150 in this case as opposed to 200 in Mostly Cloudy.