Publication Date:
2017-04-04
Description:
In the present study, we investigated the dispersion characteristics of
medium-to-long period Rayleigh waves (2 s 〈 T 〈 20 s) using both singlestation
techniques (multiple-filter analysis, and phase-match filter) and
multichannel techniques (horizontal slowness [p] and angular frequency
[~] stack, and cross-correlation) to determine the velocity structure for
the Mt. Etna volcano. We applied these techniques to a dataset of
teleseisms, as regional and local earthquakes recorded by two broad-band
seismic arrays installed at Mt. Etna in 2002 and 2005, during two seismic
surveys organized by the Istituto Nazionale di Geofisica e Vulcanologia
(INGV), sezione di Napoli. The dispersion curves obtained showed phase
velocities ranging from 1.5 km/s to 4.0 km/s in the frequency band 0.05
Hz to 0.45 Hz. We inverted the average phase velocity dispersion curves
using a non-linear approach, to obtain a set of shear-wave velocity models
with maximum resolution depths of 25 km to 30 km. Moreover, the
presence of lateral velocity contrasts was checked by dividing the whole
array into seven triangular sub-arrays and inverting the dispersion curves
relative to each triangle.
Description:
Published
Description:
69-78
Description:
3.3. Geodinamica e struttura dell'interno della Terra
Description:
JCR Journal
Description:
open
Keywords:
Mount Etna
;
Rayleigh-wave dispersion
;
S-wave velocity model
;
04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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