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Optical Effects
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The pathway of lightning clearly marked in the evening sky over Arlington, Virginia, US
Multiples examples of cumulonimbus incus, also known as anvil clouds, along with a lower layer of altocumulus undulatus, as seen from 37,000 feet above Mississippi, US
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Asperitas following a storm over Bismarck, North Dakota, US
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In sharply defined rainbows, a set of narrow coloured bands can often be found repeating on the inside of the primary bow. Called supernumerary bows, they add an extra-special dimension to the display and are produced by diffraction as light waves cross each other exiting the raindrops, as seen here over Amsterdam, Netherlands.
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Mammatus (Mamma) following a storm over Wilson, Wyoming, US
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A storm system with mammatus (mamma) approaching Saltcoats, North Ayrshire, Scotland
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A notable storm system in an area that Santiago described as formerly being desolate without any vegetation. Over the past few decades, Chinese forest rangers planted trees and gradually nurtured the environment back to life. Today, there are endless stretches of lush forest farms, as seen here near the Saibangba Forest Farm, Weichang County, Chengde City, Hebei Province, China.
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Mammatus (Mamma) spotted over Sauve, France
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Asperitas is a relatively rare formation that seems to form in the vicinity of Cumulonimbus storm systems. Asperitas differs from undulatus by the fact that its waves are more chaotic and disorderly, lacking any of the regularity and organisation typical of undulatus. This classic example of asperitas was spotted over Northern California, US.
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An imposing storm which Lisa spotted from her boat, near Åland Islands, Finland
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A panoramic view of mammatus (mamma) over Lincoln, Nebraska, US
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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 storm system spotted prior to sunset over Volturara Irpina, Italy
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A primary and secondary rainbow spotted late in the day over Northern California, US
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Following a particularly strong line of thunderstorms, accompanied by a few tornadoes in the region, Scott captured this stunning view of mammatus (mamma) as the storms departed the area near Plymouth, Wisconsin, US
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