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Strange clouds appear around the Arctic Circle
Thursday, December 17, 2015 12:52
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Sky watchers are observing an outbreak of polar stratospheric clouds or PSCs around the Arctic Circle, SpaceWeather reports. Unlike normal grey-white clouds, which hug Earth's surface at altitudes of only 5 to 10 km (3.1 – 6.2 miles), PSCs float through the… Read more »
Source: http://thewatchers.adorraeli.com/2015/12/17/strange-clouds-appear-around-the-arctic-circle/
