by APOD Robot » Tue Sep 23, 2014 4:07 am
Aurora and Volcanic Light Pillar
Explanation: That's no sunset. And that thin red line just above it -- that's not a
sun pillar. The red glow on the horizon originates from a
volcanic eruption, and the red line is the eruption's reflection from fluttering
atmospheric ice crystals. This unusual volcanic
light pillar was captured over
Iceland earlier this month. The
featured scene looks north from
Jökulsárlón toward the erupting volcano
Bárðarbunga in the
Holuhraun lava field. Even the foreground sky is picturesque, with textured grey
clouds in the lower atmosphere, shimmering green
aurora in the upper atmosphere, and bright stars far in the distance. Although the last eruption from Holuhraun was in 1797, the present
volcanic activity continues.
[/b]
[url=http://apod.nasa.gov/apod/ap140923.html][img]http://apod.nasa.gov/apod/calendar/S_140923.jpg[/img] [size=150]Aurora and Volcanic Light Pillar[/size][/url]
[b] Explanation: [/b] That's no sunset. And that thin red line just above it -- that's not a [url=http://apod.nasa.gov/apod/ap110818.html]sun pillar[/url]. The red glow on the horizon originates from a [url=http://apod.nasa.gov/apod/ap100210.html]volcanic eruption[/url], and the red line is the eruption's reflection from fluttering [url=http://www.atoptics.co.uk/halo/lpil.htm]atmospheric ice[/url] crystals. This unusual volcanic [url=http://apod.nasa.gov/apod/ap131218.html]light pillar[/url] was captured over [url=http://www.iceland.is/]Iceland[/url] earlier this month. The [url=http://vimeo.com/106804189]featured scene[/url] looks north from [url=http://en.wikipedia.org/wiki/J%C3%B6kuls%C3%A1rl%C3%B3n]Jökulsárlón[/url] toward the erupting volcano [url=http://en.wikipedia.org/wiki/B%C3%A1r%C3%B0arbunga]Bárðarbunga[/url] in the [url=http://en.wikipedia.org/wiki/Holuhraun]Holuhraun[/url] lava field. Even the foreground sky is picturesque, with textured grey [url=http://www.nasa.gov/audience/forstudents/k-4/stories/what-are-clouds-k4.html]clouds[/url] in the lower atmosphere, shimmering green [url=http://apod.nasa.gov/apod/ap131118.html]aurora[/url] in the upper atmosphere, and bright stars far in the distance. Although the last eruption from Holuhraun was in 1797, the present [url=http://en.wikipedia.org/wiki/Holuhraun#mediaviewer/File:B%C3%A1r%C3%B0arbunga_Volcano,_September_4_2014_-_15145866372.jpg]volcanic activity[/url] continues.
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