Word: mansinha
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Analyzing data at the University of Western Ontario, Geophysicists Lula Mansinha and Douglas Smylie found that the circular path traced by the North Pole between 1957 and 1968 was actually composed of interrupted arcs that spiraled almost imperceptibly inward. The inward motion, they decided, was an indication that the earth's wobble had begun to decrease for short periods of time. But between each of the arcs comprising the circle there was a break, marking a time when the wobble suddenly increased. Significantly, Mansinha and Smylie reported in Science, nearly all of the breaks occurred at the time...
...that the wobble is responsible for-rather than a result of-the earthquakes. Furthermore, he speculates, the wobble may also cause climate changes, mountain-building, and even the occasional reversal of the earth's magnetic field. But Heirtzler's theory still leaves wide open the question that Mansinha and Smylie believe they have correctly answered: What causes the wobble...
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