The geodynamics of Mt. Etna volcano during and after the 1984 eruption
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Abstract
Data concerning M > 2.5 earthquakes that occurred at Mt. Etna volcano (Sicily, Italy) during the period April 15th - October 29th, 1984 are here presented and discussed. Only those events with reliable focal mechanisms (at least eight polarities) have been considered. Instrumental information comes from local seismic networks run by the University of Catania and the CNRS (Grenoble, France). The results obtained support the hypothesis that the seismicity and the volcanic activity at Mt. Etna are related to a complex stress field, due to the combined effects of the tectonics associated with the interaction between the African and Eurasian plates and the movement of magma into the crust. In particular, we hypothesize that the tectonic forces caused the end of the 1984 eruption, by means of a "locking mechanism".
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La Delfa, S., Patanè, G. and Centamore, C. (1999) “The geodynamics of Mt. Etna volcano during and after the 1984 eruption”, Annals of Geophysics, 42(3). doi: 10.4401/ag-3739.
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