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Optical Effects
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Stratocumulus lenticularis, a less common formation of lenticular clouds, which develop at a lower level of the atmosphere, spotted over Bairnsdale, Victoria, Australia
Altocumulus lenticularis stacked one above the other, caused by wave motion in multiple humid layers of air, also known as "pile d'assiettes", spotted near the Cholla Cactus Garden, Joshua National Park, California, US
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22-degre halo over Exeter, Devon, England
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Altocumulus stratiformis undulatus, also known as a "mackerel sky", spotted over Proserpine, Queensland, Australia
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A vivid display of mammatus (mamma) over College Station, Texas, US
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A classic example of mammatus (mamma) over Paris, France
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A fogbow and a glory, with the latter being a multicoloured ring around one's shadow, spotted during a morning walk in the fog, on Mount Painter, Canberra, Australian Capital Territory, Australia
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A storm system spotted prior to sunset over Volturara Irpina, Italy
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Stratus hugging the mountains in the Rhone Valley near Sion, Switzerland
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A soliatary "UFO-shaped" altocumulus lenticularis spotted by Craig's friend, Bernadette, over Lake Como, Italy
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Altocumulus undulatus over the Outback near Coober Pedy, Australia
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A cloudbow as seen from above, by way of an airplane that took off from Curitiba, Brazil
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A primary and secondary rainbow spotted late in the day over Northern California, US
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Cirrus uncinus over the Adriatic Sea, near San Cataldo, Lecce, Italy
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A corona over North Dundas Township, Ontario, Canada
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A distrail, short for "dissipation trail", occurs when an aircraft passes through a cloud and it turns the water droplets in the cloud into gas or ice. This distrail is seen slicing its way through a layer of cirrostratus over Kianga, New South Wales, Australia.
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