It sort of looks like someone's messing with you. Can you wait until a cloud goes over and take a real close picture? I'm thinking 6 inches away where we can see both the dirt and the grass. In the mean time I'll ask some general questions to get a feel for the situation.

Where do you live?

What is your watering schedule? How often and for how long do you water?

When did you fertilize last? What did you use?

How often do you mow and how high/low do you mow?