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Lenticular clouds (Altocumulus lenticularis) are stationary lens-shaped clouds that form at high altitudes, normally aligned perpendicular to the wind direction. Lenticular clouds can be separated into altocumulus standing lenticularis (ACSL), stratocumulus standing lenticular (SCSL), and cirrocumulus standing lenticular (CCSL). Due to their shape, they have been offered as an explanation...

The Richat Structure, also known as the Eye of the Sahara and Guelb er Richat, is a prominent circular feature in the Sahara desert of west–central Mauritania near Ouadane. This structure is a deeply eroded, slightly elliptical, 40-km in diameter, dome. The sedimentary rock exposed in this dome range in age from Late Proterozoic within the center of the dome to Ordovician sandstone around its edges. The sedimentary rocks comprising this structure dip outward at 10°-20°. Differential erosi...

Night clouds or noctilucent clouds are tenuous cloud-like phenomena that are the "ragged-edge" of a much brighter and pervasive polar cloud layer called polar mesospheric clouds in the upper atmosphere, visible in a deep twilight. They are made of crystals of water ice. The name means roughly night shining in Latin. They are most commonly observed in the summer months at latitudes between 50° and 70° north and south of the equator. They can only be observed when the Sun is below the horizon...

Millions of them that descended upon the Russian village of Mikoltsy near Myadel, Belarus, in the Minsk region on May 14. The mosquitoes were so loud that even cars could not be heard. Photographer Dennis Sour managed to capture this unusual phenomenon. Such activity of mosquitoes is probably caused by the weather. Last year in Pakistan, rising flood waters drove millions of spiders up into the trees where they wove webs completely cocooning the trees.

Last Year, Phoenix, Arizona experienced a large dust storm, also known as a haboob, that caused large amounts of damage and flight delays. The Huffington Post reports that the storm reached heights of around 8,000-10,000 feet and about 50 miles wide in certain areas. Images of the storm reveal what appears to be a huge wall of sand and dust engulfing the city or something out of an apocalyptic film.

A dust storm or sand storm is a meteorological phenomenon common in arid and semi-arid region...

Earthquake clouds are clouds claimed to be signs of imminent earthquakes. They have been described in antiquity: In chapter 32 of his work Brihat Samhita, Indian scholar Varahamihira (505–587) discussed a number of signs warning of earthquakes, including extraordinary clouds occurring a week before the earthquake. In modern times, a few scientists claim to have observed clouds associated with a seismic event, sometimes more than 50 days in advance of the earthquake. Some have even claimed t...

This apparently new class of clouds is still a mystery. But experts suspect asperatus clouds' choppy undersides may be due to strong winds disturbing previously stable layers of warm and cold air.

Asperatus clouds may spur the first new classification in the World Meteorological Organization's International Cloud Atlas since the 1950s, Gavin Pretor-Pinney said.

Since the last addition to the atlas, the emergence of satellite imagery has pushed meteorologists to take a much broader view on w...

A sun dog or sundog, scientific name parhelion it is also called a mock sun or a phantom sun,is an atmospheric phenomenon that creates bright spots of light in the sky, often on a luminous ring or halo on either side of the sun.