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 m (1,837 ft) 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. Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program
