This is a worthy reminder that these monsters exist. We are now able to inventory all such volcanoes. Perhaps we should. At least we can be aware that the possibility exists when we build sea side cities. A global list would allow occasional monitoring although any activity itself will show up on the seismic record.
Here we have a very nice reminder of Santorin . If this were to blow it would produce as big a mess.
There has to be a lot more in the ocean simply unnoticed. Every atoll in the Pacific is one such.
Of course this volcano will not be doing anything soon. It is just that it could.
Undersea volcano threatens southern Italy
by Staff Writers
Europe's largest undersea volcano could disintegrate and unleash a tsunami that would engulf southern Italy
The Marsili volcano, which is bursting with magma, has "fragile walls" that could collapse, Enzo Boschi told the leading daily Corriere della Sera.
"It could even happen tomorrow," said Boschi, president of the National Institute of Geophysics and Volcanology (INGV).
"Our latest research shows that the volcano is not structurally solid, its walls are fragile, the magma chamber is of sizeable dimensions," he said. "All that tells us that the volcano is active and could begin erupting at any time."
The event would result in "a strong tsunami that could strike the coasts of Campania , Calabria and Sicily
The undersea Marsili, 3,000 meters (9,800 feet) tall and located some 150 kilometres (90 miles) southwest of Naples
It is 70 kilometres long and 30 kilometres wide, and its crater is some 450 metres below the surface of the Tyrrhenian Sea .
"A rupture of the walls would let loose millions of cubic metres of material capable of generating a very powerful wave," Boschi said.
"While the indications that have been collected are precise, it is impossible to make predictions. The risk is real but hard to evaluate."
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