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In La Vanguardia's Readers' Photos we can admire the solar pillar effect of the January sunset on the beach of Sitges, in the Garraf region.
A pillar light is an atmospheric optical phenomenon in which a vertical beam of light appears to extend above and/or below a light source.
The effect is created by the reflection of light from small ice crystals that are suspended in the atmosphere or that comprise high-altitude clouds (for example, cirrostratus or cirrus clouds).
If the light comes from the sun (generally when it is near or even below the horizon), the phenomenon is called a solar pillar, as in this case in Sitges.
The orange sky is due to arrebol, a meteorological phenomenon in which the clouds in the sky show a wide palette of colors ranging from pink to the deepest orange.
