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Feedback processes between magmatic events and flank movement at Mount Etna (Italy) during the 20022003 eruption
 

Summary: Feedback processes between magmatic events and flank movement at
Mount Etna (Italy) during the 20022003 eruption
Thomas R. Walter,1
Valerio Acocella,2
Marco Neri,3
and Falk Amelung4
Received 14 February 2005; revised 7 June 2005; accepted 15 July 2005; published 27 October 2005.
[1] The 20022003 Mount Etna eruption and the associated deformation provide a
unique possibility to study the relationships between volcanism and volcano instability.
The sequence started with movement of the eastern volcano flank and was associated
with earthquakes and the formation of surface ruptures. Then the eruption occurred from
fissures at the north and south rift zones and was followed by additional flank movement,
seismic swarms, and surface ruptures. The overall area of flank movement implicated
more than 700 km2
. In this paper we investigate how episodes of magmatic events
(eruptions and intrusions) and flank movement interact. In three-dimensional numerical
models we simulate the volcano-tectonic events and calculate changes in the static stress
field. The models suggest that the 20022003 events are the result of interrelated
processes consisting of (1) the preeruptive intrusion of magma and inflation of the
volcano, which induced (2) the movement of the volcano east flank, (3) facilitated the

  

Source: Amelung, Falk - Rosenstiel School of Marine and Atmospheric Sciences, University of Miami
Miami, University of - Geodesy Laboratory

 

Collections: Geosciences