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“Erupting Geyser, Iceland”. This is Strokkur, the (now) main erupting geyser on the geyser fields in Iceland, and this is just milliseconds before the boiling water explodes into the air under the subsurface temperature and pressure. It erupts roughly every 5 minutes and can reach as high as 40 meters. The subsurface temperature of the water is around 120 degrees celcius, but at those pressures it doesn't boil until it rises towards to surface which is what creates the eruption. Location: Strokkur, East of Reykjavik, Iceland. (Photo and caption by Jemma Lambert/National Geographic Traveler Photo Contest)
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