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Ash and lapilli on the square | by etnaboris
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Ash and lapilli on the square

The spectacular but brief episode of lava fountaining (also called paroxysm) at the Southeast Crater of Mount Etna during the night of 12-13 January 2011 caused heavy falls of volcanic ash and small fragments of very porous rock called scoriae or lapilli (or most correctly, scoriaceous lapilli) on the south flank of the volcano. This is a view of the "Nicolosi Nord" (or "Etna Sud") tourist area, better known for the Rifugio (mountain hut) Sapienza, where some of the scoriae were up to 3-4 cm in diameter.

 

Photo taken on the morning of 13 January, just a few hours after the end of the paroxysm

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Taken on January 13, 2011