This image, taken with the Venus Monitoring Camera (VMC) on board ESA’s Venus Express shows a wave train in the clouds at mid-latitudes (centred at 52º north, 194º west ( or -166º east). The typical wavelength (span) of these waves is a few tens of kilometres.
This image was taken on 24 May 2006, from a distance of 1000 km from the surface of Venus in the ultraviolet, at 365 nanometres.