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The Daily Volcano Quote: a basic goal of volcanology 9 March 2012

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It is a basic goal of volcanology to investigate what causes the change from an inactive or weakly active state to an active phase, as well as the accompanying phenomena, We can only deduce from observations and plausible arguments that over the long term, increased activity is a consequence of the rise of a batch of magma from the depths. We cannot know why, when, where, or how big.

Rolf Schick, The Little Book of Earthquakes and Volcanoes (New York: Copernicus Books, 2002), p. 142.

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