Abstract
THE term volcanic earthquakes has for long been applied to all earthquakes originating within the bounds of active or dormant volcanoes. Such earthquakes are usually distinguished from ordinary tectonic earthquakes by their small disturbed areas, the great intensity of the shocks near the centres of those areas, the brevity and abruptness of the shocks, and the comparative absence of fore-shocks and aftershocks. While the countless tremors which precede and accompany volcanic explosions are no doubt the effects of such explosions, it has been assumed, perhaps rather hastily, that all volcanic earthquakes are as intimately connected with the volcanic operations. Several recent investigations (see NATURE, vol. xcii., pp. 716–7; vol. xcv., p. 215) have, however, shown that many volcanic earthquakes are of a tectonic or semi-tectonic character, and that both earthquakes and eruptions are in all probability effects of the same cause or causes.
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DAVISON, C. The Etnean Earthquakes of May, 1914. Nature 96, 123–124 (1915). https://doi.org/10.1038/096123b0
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DOI: https://doi.org/10.1038/096123b0