News tagged with ash clouds

NASA image: Night-shining clouds

In the late spring and summer, unusual clouds form high in the atmosphere above the polar regions of the world. As the lower atmosphere warms, the upper atmosphere gets coooler, and ice crystals form on meteor ...

dateJun 22, 2015 in Earth Sciences
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How atmospheric rivers form

If you want to assign blame on an overcast day, then cast your eyes on the tropics. Water vapor originating from the Earth's tropics is transported to midlatitudes on long filaments of flowing air that intermittently ...

dateJun 09, 2015 in Earth Sciences
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Kelut volcano grounds flights

The Kelut volcano on Indonesia's Java island erupted late last night. While disaster-management authorities are busy on the ground, satellites are tracking the major cloud of ash and sulphur dioxide as it ...

dateFeb 17, 2014 in Earth Sciences
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