Scientists Unlock Old Faithful's Big Secret
The Yellowstone geyser is fed by a large cavern
By Neal Colgrass, Newser Staff
Posted Apr 21, 2013 6:48 AM CDT
Old Faithful in action.   (Shutterstock)

(Newser) – Mystery solved: Scientists say they've finally figured out why Old Faithful erupts with super-hot water and steam about every 90 minutes, Our Amazing Planet reports. Seismic records show that under the Yellowstone geyser, a large egg-shaped chamber is connected to the mouth of Old Faithful by a sort of pipe. After every eruption, water levels rise in the chamber and send steam bubbles into the conduit—which creates a "bubble trap" that leads to the eventual steam explosion.

What's the big deal? The finding helps discredit an old idea that large geysers are fed by long, narrow tubes (Our Amazing Planet describes Old Faithful's "plumbing [as] more like a bagpipe than a flute"). Researchers made a similar finding earlier this year in Russia, where geysers are also fed by caverns that create bubble traps. Another neat fact: Scientists were able to map Old Faithful's cavern with seismic records because gas bubbles create tremors when they pop. And there's good news for those eager to visit it: Sequestration forced the park to postpone its annual snow-plowing efforts, pushing the opening date to April 26; but the Billings Gazette reports that the road to Old Faithful opened Friday, due to a happy combination of good weather, less snow than expected, and help from the state's Department of Transportation.

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Apr 22, 2013 9:47 AM CDT
When I was a kid, my science teacher said that a certain amount of water entered a crater of sorts & it took a certain amount of time for it to get hot enough to shoot upwards. That over years, they expected the amount of water to grow & thus becoming longer between bursts. Maybe I was asleep I don't know
Apr 22, 2013 8:33 AM CDT
This is nothing new. Such hydrothermic dynamics have been known for ages. If it's plumbing were built like a flute, the steam would be released through the finger holes. Why is this news?
Apr 21, 2013 8:44 PM CDT
republicons provide the hot air.