Scientists uncover source of Old Faithful’s hot water supply

Science | AAAS | 10/10/2017 | Staff
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If only humanmade plumbing were as reliable as Old Faithful’s. Every 90 minutes or so, Yellowstone National Park’s iconic geyser (pictured) spews water and steam 40 meters high, on a schedule so precise that tourists know when to gather to watch the show. Now, geophysicists have caught a glimpse of the subsurface reservoir that supplies the clockwork gusher. Most subsurface imaging relies on seismic waves, often generated by small explosions or by “thumper” trucks—measures far too disruptive for a national park. So instead, researchers relied on natural vibrations: They...
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