Download largest version (mp4, 5.5 MB)

It is observed that during each burst from Brimstone Pit in October 2005, gas droplets float up from the eruptive cloud. The manipulator arm of the Hyper Dolphin ROV places a probe into the cloud and measures a temperature of 130°C [266°F], much higher than was measured last year [only 30°C], but still well below the boiling point of seawater at this depth [530 meters]. Video courtesy of Yoshihiko Tamura, JAMSTEC October 2005 Expedition.