From the ET:
Jakarta - Scientists have discovered a giant undersea volcano off Indonesia's Sumatra island, the state-run Antara news agency said Friday. The volcano spans 50 kilometres at its base with a height of 4,600 metres, said Yusuf Surachman, a director at the state-run Agency for the Assessment and Application of Technology. Indonesian, American and French scientists found the volcano 330 kilometres off Bengkulu province on Sumatra while they were surveying the sea floor to study changes in its geological structure following major earthquakes in the region. "This volcano is huge and tall. There are no volcanoes of similar height on Indonesian land," he was quoted as saying by Antara. Surachman said the scientists did not know if the volcano was active....Did you catch that? A volcano 15,000 feet tall and thirty miles across at its base. And, oh, it might be active.
Here's a 2007 story from NewScientist that I posted at Climateer:
The true extent to which the ocean bed is dotted with volcanoes has been revealed by researchers who have counted 201,055 underwater cones. This is over 10 times more than have been found before.
The team estimates that in total there could be about 3 million submarine volcanoes, 39,000 of which rise more than 1000 metres over the sea bed.
Human beings aren't near as smart as we think we are, a point I exemplify on a daily basis at Climateer Investing.From NewScientist