In recent years, increasing numbers of volcanoes are being recognized as having undergone large sector collapses. How far such events can change the succeeding behaviour of the volcano is poorly known, despite the importance for natural hazards and economic applications. By analysing the last 100-kyr geological history of Stromboli (Italy), which has involved multiple collapses, this paper illuminates the feedback effect between sector collapse and magma upwelling and emplacement. The collapsed zone of Stromboli is episodically unbuttressed, draining magma preferentially with formation of eruptive centres in the collapse amphitheatre and dyking along the collapse shoulders. After a collapse, there were no further linear eruptions across the cone on opposing middle-lower slopes, but these occurred again after rebuilding of the cone. The time-averaged eruption rate increased immediately before the first collapse and remained higher during the succeeding period of frequent collapses.
|Citazione:||Tibaldi, A. (2004). Major changes in volcano behaviour after a sector collapse: insights from Stromboli, Italy. TERRA NOVA, 16(1), 2-8.|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Titolo:||Major changes in volcano behaviour after a sector collapse: insights from Stromboli, Italy|
|Data di pubblicazione:||1-feb-2004|
|Appare nelle tipologie:||01 - Articolo su rivista|