Disturbances...

Caption NASA:"Daphnis cruises through the Keeler Gap, raising edge waves in the ring material as it passes.
As is characteristic of waves raised by a moon on the edges of a very narrow gap like Keeler, the wave begins as a coherent form near Daphnis and becomes less so with increasing orbital distance from the moon. Daphnis is about 7 Km (4,3 miles) across.
This view looks upon the lit side of the Rings from about 31° below the Ring-Plane.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 17, 2007 at a distance of approx. 768.000 Km (about 477.000 miles) from Daphnis. Image scale is roughly 5 Km (about 3 miles) per pixel".