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A Babe in the Universe

Kealakekua and Tsunamis

7 Apr 2010, 21:36 UTC
Kealakekua and Tsunamis
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Italy's National Institute of Geophysics and Volcanology has warned that Europe's largest undersea volcano, Marsili, could collapse at any time. Enzo Boschi, President of the NIGV, warned that Marsili's fragile walls could collapse without warning. The resulting tsunami would engulf the Italian coast. Marsili is located 150 kilometres South of Naples, and its crater is only 450 meters below the Mediterranean surface.Above is a favourite place, Kelakekua Bay on the Big Island. It was the site of great tragedy when Captain Cook's blood was spilled in 1779. Today it has some of the best snorkelling reefs on the island. Spinner dolphins are often seen in the bay too.The steep cliff on the far side of the bay marks where a 30-km chunk of the shoreline broke free 120,000 years ago and plunged into the sea. The resulting tsunami completely submerged the island of Kaho'olawe, 1427 feet high! The wave continued and nearly inundated the island of Lanai. Today on Lanai you can still find chunks of coral deposited at the 1000-foot level.Cumbre Vieja volcano in the Canary Islands looks peaceful now. Undersea surveys have found a 400 cubic km landslide, the debris of a prehistoric eruption. Previous activity has caused ...

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