Un'enorme massa rocciosa minaccia di franare sulla zona a valle del ghiacciaio dell'Aletsch, in Vallese. Le dimensioni, secondo gli esperti, sono nell'ordine di 200 milioni di metri cubi, o anche oltre. L'equivalente, tanto per intenderci, di 85 piramidi di Cheope.
Lo rende noto RTS oggi, martedì, precisando che i geologi, negli ultimi giorni, hanno constatato un'estensione spettacolare delle fratture nelle rocce. La massa in questione si muove adesso ad una velocità di ben 20 centimetri al giorno.
Stando agli specialisti è certo che una parte di questa montagna cederà, anche se naturalmente non è dato sapere quando e in che misura. Nessun edificio è minacciato, ma il monitoraggio della zona è stato ora fortemente rafforzato. I sentieri sono stati chiusi lungo tutto il perimetro sotto sorveglianza.
RTS/ARi
Dal TG20:
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