Low-level clouds having small spaces between them whereby light is bent around them. As one may notice in this photo, the photographed clouds are quite falt-based and has formed due to weak air convection currents as proved by this weather sounding. This convection is indicated as `Thermal` in the weather sounding and was induced due to a relatively cool airmass on the eastern side of a blocking upper high flowing over a still warm sea and reaching the Maltese Islands. However, the airmass just above that touching the surface still retains its relative dryness and stability making it impossible for such clouds to grow further. In the background, the sky remained clear. Hence this could also have been the case of a phenomena called `self-destruct sunshine` given the very light northeasterly wind. This is explained in the last chart. The photo on the first thumbnail is a panorama showing such cloud in further detail.