sabato 14 aprile 2012

Sand Boil Forms during 1989 Loma Prieta earthquake

video

Sand Boil—sand-laden water can be ejected from a buried liquefied layer and erupt at the surface to form sand volcanoes; the surrounding ground often fractures and settles. Definition & photo from USGS.

 Testo e Video dal sito: Iris.edu 

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