Publication Date:
2017-04-04
Description:
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 broadband
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.
Description:
Published
Description:
L22309
Description:
3.6. Fisica del vulcanismo
Description:
1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive
Description:
JCR Journal
Description:
reserved
Keywords:
magmatic system
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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