There She Blows

The Old Faithful Geyser in the World Heritage Site of Yellowstone National Park erupts under the stars during a summer night in Wyoming, United States. This one-minute sequence of 3 photos displays how the eruption happens. The geyser is known as one of the most predictable natural landmarks in the world, erupting in intervals of between 60 and 110 minutes. Stars of the Ursa Major (the Big Bear) are right above the eruption and the North Star, Polaris, in the constellation Ursa Minor (the Little Bear) is at the upper right. Noted by the photographer: “Wandering at Yellowstone in a summer night there is a good chance to face a big bear on the ground too!” See the second image for the Big and Little Dipper figures. The eruption of this strong cone geyser can shoot 14000–32000 liters of boiling water to a height of 30–55 meters. The Old Faithful has been erupting at least since the late 1800s.