Word: strains
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Dates: during 1950-1959
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...heart attack. Sportsman Grey kept a swivel, deep-sea fishing chair on the upstairs porch of his Altadena, Calif, home. His daily practice with a weighted rod proved too great a strain on his heart...
...time, to keep her at home and well attended, Braunsdorf had four jobs-one playing the bass viol with the orchestra, one teaching music, one on a Ford assembly line, and one as registrar with Detroit Business University. The strain of such a working schedule soon began to tell. In 1942 Braunsdorf fell ill, put all his earnings in a florist shop to recoup his finances, but eventually had to sell it at a loss. Finally, he resigned himself to leaving Virginia at a private sanitarium...
Such regularity in a chart usually means that an overall law is operating. Dr. Benioff studied more records, made more charts, and found evidence that the earth generates earthquake-producing strain at a constant rate. When the strain is not released in earthquakes, it accumulates at crustal weak points until something has to give. Then comes a series of earthquakes, followed by a period of quiet until more strain has accumulated...
...there was a great burst of earthquakes that lasted three years.* This period produced a tall jog on Dr. Benioff's chart. Since then the jogs have been smaller. Today the earth is having continual, mild earthquake activity. This means in Dr. Benioff's theory that the strain in the crust is being released as fast as it is generated. By the same reasoning, a period of no earthquake activity ought to be followed by a proportionately violent flare...
...Benioff does not try to guess what generates the strain, but he speculates on how it is released. Great earthquakes, he says, are associated with major faults (cracks) in the crust. When the faults are locked tightly together, the strain accumulates without producing earthquakes. When the faults relax, the rocks slip and shake the earth...