Insights into the dynamic processes of the 2007 Stromboli eruption and possible meteorological influences on the magmatic system

Details Insights into the dynamic processes of the 2007 Stromboli eruption and possible meteorological influences on the magmatic system Insights into the dynamic processes of the 2007 Stromboli eruption and possible meteorological influences on the magmatic system

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3422309p&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 22, CiteID L22309

Physics

7

Seismology: Volcano Seismology (8419), Seismology: Earthquake Interaction, Forecasting, And Prediction (1217, 1242), Volcanology: Explosive Volcanism, Volcanology: Atmospheric Effects (0370)

Scientific paper

The unrest of Stromboli volcano leading to the February 27-April 2, 2007 eruptive period and to the March 15 paroxysm is constrained by combining broad-band seismic data and 1-Hz GPS (High Rate GPS - hereinafter HRGPS) measurements. During the pre-eruptive stage, the simultaneous examination of seismic and HRGPS data, together with weather parameters, suggests the possible influence of external perturbations on the magmatic system, which evolved toward a critical state after January 2007. Some days after the onset of the eruption, a sudden change of the seismic and eruptive behaviour was recognized, while ground deformation began to show a deflation. The March 15 paroxysm was preceded, about two days before, by a peak of the HRGPS spectral power densities (a small inflation) and by the occurrence of a few VT earthquakes located at depths down to 3.5 km b.s.l.. These findings constrain, for the first time at Stromboli volcano, the deep origin of a fast rising magma batch, rich in gas, that led to a strong explosive event.

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