CAUSE OF EARTHQUAKES
The modern theory of earthquakes, says the "Daily Mail," is that they are due to shrinkage in the earth's crust, which grows smaller as it contracts on cooling. In some coses the shrinkage takes place at a groat depth, and the disturbance may be almost explosive in if-B violence, affecting a large area. From causes which are not yet clear, great earthquakes are usually accompanied by strange electrical and atmospheric phenomena. They are generally preceded by, a period of "stillness and intense heat,-its before a great thunderstorm. Then comes a rush of wind, which may be of.-i cyclonic ,intensity, accompanied by grinding noises and a sound like that of thunder deep in the earth. Before the actual shocks become perceptible', the animal world shows signs of distress and terror. The shocks rise to a maximum and then diminish, but sometimes weeks pass before the area over which shrinkage is taking place ceases to tremblei
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Bibliographic details
Evening Post, Volume CVI, Issue 126, 24 November 1923, Page 16
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157CAUSE OF EARTHQUAKES Evening Post, Volume CVI, Issue 126, 24 November 1923, Page 16
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