Stromboli volcano (Southern Italy), only few minor precur- sors (gas output) have been identified for ‘major’ Strombolian explosions. We use ground-based interferometric synthetic aperture radar (GBInSAR) technology to monitor the displace- ment rate of the summit area of Stromboli. We analysed the 2009–2011 period. The analysis of the displacement rate has been performed by dividing the summit zone monitored by the GBInSAR into three regions, corresponding to the edge of the crater area (1 and 2), and to the slope of the NE crater (3). Pulses of rapid expansion of sector 3, of variable duration and amplitude, appear in coincidence with periods of intense activity that include lava flows and major explosions. We associate this expansion with the pressurization of the magma column that is recharged by deep-derived gas, promoting the onset of ‘major explosion-dominated’ activity.

Ground-based InSAR reveals conduit pressurization pulses at Stromboli volcano

DI TRAGLIA, FEDERICO;CASAGLI, NICOLA
2013

Abstract

Stromboli volcano (Southern Italy), only few minor precur- sors (gas output) have been identified for ‘major’ Strombolian explosions. We use ground-based interferometric synthetic aperture radar (GBInSAR) technology to monitor the displace- ment rate of the summit area of Stromboli. We analysed the 2009–2011 period. The analysis of the displacement rate has been performed by dividing the summit zone monitored by the GBInSAR into three regions, corresponding to the edge of the crater area (1 and 2), and to the slope of the NE crater (3). Pulses of rapid expansion of sector 3, of variable duration and amplitude, appear in coincidence with periods of intense activity that include lava flows and major explosions. We associate this expansion with the pressurization of the magma column that is recharged by deep-derived gas, promoting the onset of ‘major explosion-dominated’ activity.
Stromboli volcano
volcanic hazard
Radar basato a terra (GB-SAR)
RADAR INTERFEROMETRY
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.14083/14133
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