Scientists watch deep-sea volcano for first time

SAN FRANCISCO — Scientists have witnessed the eruption of a deep-sea volcano for the first time ever, capturing on video the fiery bubbles of molten lava as they exploded 4,000 feet beneath the surface of the Pacific Ocean in what researchers are calling a major geological discovery.

A submersible robot witnessed the eruption during an underwater expedition in May near Samoa, and the high-definition videos were presented Thursday at a geophysics conference in San Francisco.

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