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Hydrological Effects on Seismic‐Noise Monitoring in Karstic Media
Author(s)
Language
English
Obiettivo Specifico
7T. Variazioni delle caratteristiche crostali e "precursori"
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/48 (2021)
ISSN
0094-8276
Publisher
Wiley-Agu
Pages (printed)
e2021GL093191
Issued date
August 2021
Abstract
Fluctuations in groundwater content may produce surface deformation and affect the elastic properties of the Earth’s crust.
In this study we evaluate the temporal variations of the Earth’s crust elastic properties (in the form of relative seismic-velocity variations) in a tectonically active region in northern Italy characterized by the presence of karst systems.
In this area, GPS measurements already revealed hydrologically-induced deformation, modulated by changes in groundwater storage.
We study the relation of our seismological observations with the geodetic and hydrological results and identify the effects of groundwater-content variations in the seismic-velocity perturbations.
Our results show that hydrologically-induced changes in karstic media produce significant seismic-velocity perturbations, therefore its role in tectonic-stress adjustment studies must not be ignored.
Depth sensitivity analysis of our results constrain the crustal perturbations to range between 1 and 4 km depth.
Results from scattering imaging locate the crustal perturbations along the main karst systems.
In this study we evaluate the temporal variations of the Earth’s crust elastic properties (in the form of relative seismic-velocity variations) in a tectonically active region in northern Italy characterized by the presence of karst systems.
In this area, GPS measurements already revealed hydrologically-induced deformation, modulated by changes in groundwater storage.
We study the relation of our seismological observations with the geodetic and hydrological results and identify the effects of groundwater-content variations in the seismic-velocity perturbations.
Our results show that hydrologically-induced changes in karstic media produce significant seismic-velocity perturbations, therefore its role in tectonic-stress adjustment studies must not be ignored.
Depth sensitivity analysis of our results constrain the crustal perturbations to range between 1 and 4 km depth.
Results from scattering imaging locate the crustal perturbations along the main karst systems.
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