Che cosa è accaduto esattamente al Pizzo Cengalo il 23 agosto 2018? I geologi avevano previsto il distacco di roccia, ma ciò che è accaduto li ha sorpresi. Infatti la frana non era composta solo da massi rocciosi, ma anche da un grande volume di acqua che ha causato un ingente flusso di detriti. Da dove proveniva questa enorme massa d’acqua? Gli esperti incaricati di studiare la frana hanno elaborato due teorie diverse.
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