Ring of Fire 2006 Expedition. If we were observing this type of eruptive activity on land, we would have to run for our lives! At Brimstone Pit the pressure of 560 meters (1837 feet) of water over the site reduces the power of the explosive bursts. Also, the water quickly slows down the rocks and ash that are violently thrown out of the vent. 2006.
Credit: Submarine ROF 2006, NOAA Vents Program.