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In Lake Powell, white calcium deposits show the extent to which the water level has dropped, around 30ft. Photograph: Chris McGreal for the Guardian

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Jackie Skaggs snapped this stunning photo of a lenticular cloud embracing the summit of the Grand Teton Range from the park’s headquarters in Moose, Wyoming, on Feb. 12, 2015.

Yellowstone Region’s Earthquake Threat Larger Than Previously Estimated, Scientists Say

A close-up photo of one of Yellowstone National Park’s thermal features. Yellowstone holds the Earth’s most diverse collection of geysers, hot springs, mudpots and fumaroles, according to the National Park Service. (Dave Reichert)

Yellowstone’s Steamboat geyser sees rare eruption

July 31, 2013: Steamboat Geyser, in Yellowstone National Park’s Norris Geyser Basin in Wyoming, erupts on Wednesday. (AP)

Published August 01, 2013
Associated Press

BILLINGS, Mont. –  Old Faithful it’s not.

Yellowstone National Park’s Steamboat Geyser — the world’s tallest — has erupted for the first time in more than eight years.

The nine-minute blast sent steaming hot water an estimated 200 to 300 feet in the air, park geologist Hank Heasler said Thursday.

Unlike the park’s popular and famous Old Faithful geyser, which spews water like clockwork every hour-and-a-half, no one knows when Steamboat will erupt next.