Publication Date:
2021-01-22
Description:
This article has been accepted for publication in Geophysical Journal International ©: The Authors 2020. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Uploaded in accordance with the publisher's self-archiving policy.
Description:
We present 2-D attenuation images of the Mt Etna volcanic region on the basis of separation
of intrinsic and scattering effects. The analysis presented here exploits a large active seismic
database that fully covers the area under study. We observe that scattering effects dominate
over intrinsic attenuation, suggesting that the region is very heterogeneous. Comparison with
analyses conducted at other volcanoes reveals that the Mt Etna region is characterized by
high intrinsic attenuation, resulting from the presence of large volcanoclastic deposits at
shallow depth. The 2-D distributions of intrinsic and scattering anomalies show the presence
of regions characterized by high and low attenuation effects, corresponding to several tectonic
and volcanic features. In particular, we identify a high attenuation region in the SW sector of
the Mt Etna volcanic complex, which is correlated with high seismicity rates and volcanism.
This work supports the hypothesis of a link between the dynamics of the SW flank and the
recharge of the volcano in the last decades, occurring under the summit crater and, secondarily,
the upper South rift zone.
Description:
Published
Description:
267-277
Description:
2V. Struttura e sistema di alimentazione dei vulcani
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
