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- <text id=92TT2038>
- <title>
- Sep. 14, 1992: Quake Predictor
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1992
- Sep. 14, 1992 The Hillary Factor
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- THE WEEK, Page 20
- HEALTH & SCIENCE
- Quake Predictor
- </hdr><body>
- <p>Changes in a geyser's timing may mean the earth is about to
- move
- </p>
- <p> Geysers like Old Faithful fire fountains of steaming water
- from the earth at impressively regular intervals. When the
- intervals change, though, it may be time to stop being impressed
- and start running for cover. According to a report in Science,
- the interval between one geyser's eruptions, at least, tends to
- fluctuate before a major earthquake takes place. The only catch:
- the quakes happen far away.
- </p>
- <p> The report is based on a study of a geyser near Calistoga,
- a town in Northern California's wine country noted for its hot
- springs. Two scientists, now at Washington's Carnegie
- Institution, analyzed the timing of eruptions from 1973 to 1991.
- They found that the schedule was disrupted one to three days
- before each of the three biggest earthquakes of the period in
- the region. Just before the devastating Loma Prieta quake that
- hit the San Francisco area during the 1989 World Series, for
- example, the time between eruptions jumped from 90 to 150
- minutes. Because the quakes occurred up to 250 km (155 miles)
- from the geyser, the data are not very helpful in warning the
- public, but they do support the idea that earthquakes result
- from underground stresses ranging over wide areas, not just
- along local faults.
- </p>
-
- </body></article>
- </text>
-
-