Groundwater Monitoring in Regional Discharge Areas Selected as “Hydrosensitive” to Seismic Activity in Central Italy

Petitta, Marco; Barberio, Marino Domenico; Barbieri, Maurizio; Billi, Andrea; Doglioni, Carlo; Passaretti, Stefania; Franchini, Stefania

doi:10.1007/978-3-030-34397-2_5

Cited by 2 publications

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“…The results also highlighted the aspect named "Hydrosensitivity" of the monitoring site 5,9,51,52 . With the term hydrosensitivity we refer to the ability of a hydrogeological system to respond to external perturbations (e.g.…”

Section: Discussionmentioning

confidence: 77%

“…Furthermore, other monitoring sites also located in fractured aquifers in Central Italy did not show such water table oscillations. Consequently, the possibility of observing groundwater level response to far-field seismicity is strongly related to the selection of the monitoring site, and should take into consideration several criteria 52 , the first of which is the difference between porous and fractured aquifers, where the latter can clearly show responses to teleseismic activity.…”

Section: Discussionmentioning

confidence: 99%

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New observations in Central Italy of groundwater responses to the worldwide seismicity

Barberio

Gori

Barbieri

et al. 2020

Sci Rep

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Chemical and physical responses of groundwater to seismicity have been documented for thousands of years. Among the waves produced by earthquakes, Rayleigh waves can spread to great distances and produce hydrogeological perturbations in response to their passage. In this work, the groundwater level, which was continuously recorded in a monitoring well in Central Italy between July 2014 and December 2019, exhibited evident responses to dynamic crustal stress. In detail, 18 sharp variations of the groundwater level due to worldwide Mw ≥ 6.5 earthquakes were observed. Apart from earthquakes that occurred in Papua New Guinea and those with a hypocentral depth > 150 km, all far away Mw ≥ 7.6 earthquakes produced impulsive oscillations of groundwater. As the earthquake magnitude decreased, only some earthquakes with 6.5 ≤ Mw < 7.6 caused groundwater level perturbations, depending on the data acquisition frequency and epicentral distance from the monitoring well. A clear correlation between earthquake distance and magnitude in hydrogeological responses was found. Our results shed light on the hydrosensitivity of the study site and on the characteristics of fractured aquifer systems. Detecting the water table variations induced by distant earthquakes is another step towards a correct identification of (preseismic) hydrogeological changes due to near-field seismicity.

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Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%