Changes in Wind Streaks on the Slopes of Arsia Mons. The changes in both dark and light streaks shown occurred after the global dust storms. In the lower image, winds blowing down the long slopes of the volcano redistributed some of the light coating of dust deposited during the global dust storms, forming both dark streaks (erosion of dust) and bright streaks (deposition of additional dust). Both images are about 1000 km across. North is to the upper left. [574A46, 648A03; 9∞ S, 124∞ W]