Four volcanic vents are active in Kamchatka:
This video is amazing! a 360 degree pannable ride in a helecopter:
http://www.spiegel.de/static/360grad/kamtschatka/
(edit…via slashdot.com)
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Just watched the video. Absolutely stunning. Amazing tech. n/t
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Not 4 vents, but 4 separate magma channels. Amazing.