blast of ash, Mount Etna. 爆炸的灰, 埃特納火山.

Chris Hadfield / CSA via Twitter
Canadian astronaut Chris Hadfield snapped this photo of Italy's Mount Etna from the International Space Station.
Astronaut witnesses Mount Etna's blast of ash - PhotoBlog http://photoblog.nbcnews.com/_news/2013/02/28/17135498-astronaut-witnesses-mount-etnas-blast-of-ash?lite
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