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See Aurum Geyser, Upper Geyser Basin, Yellowstone National Park

Aurum Geyser is constantly boiling in its main vent, a small pool surrounded by raised sinter deposits almost forming a cone structure. The surrounding area is covered in hard sinter and a few other smaller steaming vents. Before an earthquake in 1983, Aurum was actively boiling but eruptions were rare. Now, eruptions are irregular, ranging from 22 hours to over 2 weeks. Erupts 20 feet (6 m) for 70 seconds. Aurum Geyser has an average temperate of 199.4°F (93°C), an average pH of 8.6, and an average conductivity of 1761 uS/cm.
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