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Maroc Maroc - WN.COM - Environment - Hier 14:06

Why some volcanoes don't explode

The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was thought that gas bubbles were formed primarily when the ambient pressure dropped while the magma was rising. Gases that were dissolved in the magma in lower strata—due to the higher pressure—escape when the pressure drops and form bubbles. The more bubbles there are in the magma, the lighter it becomes and the faster it rises. This can cause the magma to tear apart, leading to an explosive eruption. This process can be likened to a bottle of champagne: while the bottle is closed and therefore pressurized, the carbon dioxide remains in solution. When the cork is removed from...

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