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Message: <blockquote data-quote="nir25" data-source="post: 6702274" data-attributes="member: 133993">A natural  phenomenon is a non-artificial event in the physical sense, and  therefore not produced by humans, although it may affect humans. Common  examples of natural phenomena include volcanic eruptions, weather, and decay. Most  natural phenomena, such as rain, are relatively harmless so far as  humans are concerned. There are various types of natural  phenomena, which include Meteorologicalphenomena, weather,  including hurricanes, thunderstorms and tornadoes,  and geological phenomena, including volcanic activity and earthquakes. Aurora Borealis <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Undoubtedly one of the most beautiful  events to occur in our world, the Aurora Borealis, also known as the Northern Lights, has both astounded  and amazed people since it was first discovered. Mammatus  Clouds <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> They are a cellular pattern of pouches  hanging underneath the base of a cloud. Composed primarily of  ice, Mammatus Clouds can extend for hundreds of miles in each direction.  Mammatus clouds are often harbingers of a coming storm or other extreme  weather system. Red Tides <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> More correctly known as an algal bloom,  the so-called Red tide is a natural event in which estuarine, marine, or  fresh water algae accumulate rapidly in  the water column and can convert entire areas of an ocean or  beach into a blood red color. Penitentes <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> These amazing ice spikes, generally  known as penitentes can be found on mountain glaciers and vary in size dramatically. Initially,  the sun’s rays cause random dimples on the surface of the snow. Sailing  Stones <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci5.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Rocks weighing up to hundreds of pounds  have been known to move up to hundreds of yards at a time. Some  scientists have proposed that a combination of strong winds and surface  ice account for these movements. Supercells <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci6.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Super cell are usually isolated storms,  which can last for hours, and sometimes can split in two, with one storm  going to the left of the wind and one to the right. They can spout huge  amounts of hail, rain and wind and are often responsible for tornados. Fire  Whirls <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci7.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> A fire whir is a rare phenomenon in  which a fire, under certain conditions acquires vertical vortices and  forms a whirl of a vertical orientation rotating column of air. They can  be as high as 30 to 200 ft tall. Ice  Circles <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci8.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Ice Circles are formed when surface ice  gathers in the center of a body of water rather than the edges. A slow  moving river current can create a slow turning eddy, which rotates,  forming an ice disc. These ice circles have been seen with diameters of  over 500 feet. Gravity  Waves <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci9.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> The undulating pattern of a Gravity  Wave is caused by air displaced in the vertical plain, usually as a  result of updrafts coming off the mountains or during thunderstorms.  Nature then tries to restore the fluid changes caused by updrafts within  the atmosphere, which present in a visible oscillating pattern within  the cloud. Fire  Rainbow <img src="http://listphobia.com/wp-content/uploads/122909_1726_10MostFasci10.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Fire rainbow appears when the sun is  high in the sky and its light passes through diaphanous, high-altitude  cirrus clouds made up of hexagonal plate crystals. [Source:Net] </blockquote>

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