Word: geyser
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Dates: during 1970-1979
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...concept was developed by Physicist John S. Rinehart of the National Oceanic and Atmospheric Administration, who has been comparing the past activities of Old Faithful and two other famous geysers-Yellowstone's Riverside and Old Faithful in Calistoga, Calif.-with earthquake records dating back more than a century. He found that although geysers are commonly thought to erupt with clocklike regularity, their timing begins to change as the stresses that lead to quakes begin increasing in the earth around them; Yellowstone's Old Faithful speeds up any time from two to four years before a major quake within...
...Alaska before the quake, Rinehart speculates, traveled through the earth at a rate of from three to six miles per day, eventually reaching as far south as Yellowstone National Park. There they put increasing pressure on the hot-water "plumbing" of Old Faithful. As a result, the geyser began spouting with increasing frequency until the quake finally relieved the strain, allowing Old Faithful to resume a more leisurely pace...