Flow banding on Southeast Flank of Mount Lassen

20061012 Mount Lassen 1 (155), originally uploaded by moheroy.

Not all my Lassen pictures turned out badly, but then some things are hard to mess up. This is flow banding on the Southeast flank of Mount Lassen. The direction of the flow is along a line running 25° NW/SE. Which since Mount Lassen is 25° NW suggests that this is the flow's point of origin.