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The monsters wakes up ! Katla Hekla Iceland Dead Zone and rift as uniform system ! A lot of others worldwide !
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[quote:Anonymous Coward 38204495:MV8xNzg2NDI0XzM3MzQ4MDU4X0MwMjhGOEEz] [quote:Luisport:MV8xNzg2NDI0XzM3MzQ1MjI0Xzc3MzEyRUZD] http://www.wired.com/images_blogs/wiredscience/2013/04/8641998536_4fba5e18db_c.jpg A "smoke" ring (actually made of steam, volcanic gases and maybe some ash) produced at Italy's Etna on April 11, 2013. Image: Dr. Boris Behncke, INGV http://www.wired.com/wiredscience/2013/04/eruption-update-for-april-16-popocatepetl-etna/ [/quote] Claude Grandpey http://volcans.blogs-de-voyage.fr/2010/02/11/pourquoi-letna-fume-t-il-la-pipe/ Why does Mount Etna smoke the pipe? ...Scientists explain that getting a ring requires two initial conditions: smoke and speed at the start. In the case of the volcano, it is the fumaroles and the rising hot air that is emitted by a vent that are likely to generate the rings. But all the jets do not become smoke rings! A smoke ring can only be achieved if the jet is discontinuous. It is formed around a core around which the fluid rotates. Each part of the ring is subject to the induced velocity of the other parties: the right half of the ring rotates clockwise, and the left half in the opposite direction. Thus, the ring cannot stay still: it is in constant motion relative to the fluid that surrounds it. Thus, a ring does not stand still above Mount Etna; it inexorably moves away... pics http://volcans.blogs-de-voyage.fr/wp-content/blogs.dir/1539/files/2010/02/2061898379.jpg http://volcans.blogs-de-voyage.fr/wp-content/blogs.dir/1539/files/2010/02/1028024411.jpg http://volcans.blogs-de-voyage.fr/wp-content/blogs.dir/1539/files/2010/02/2507243.jpg [/quote]
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