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III.—On the Theory of Vorticose Earthquake-Shocks
Published online by Cambridge University Press: 01 May 2009
Extract
Earthquake-shocks have generally been divided into three classes:
a. Undulatory shocks, by far the most commonly felt, consisting of one or several waves, the movement at any place being to and fro along a line inclined to the horizon, but in general nearly horizontal.
b. “Sussultatore” shocks, consisting of one or more up-and-down movements, in a nearly vertical direction.
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References
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