Michele Saroli

Università degli studi di Cassino e del Lazio Meridionale

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Marco Moro

Istituto Nazionale di Geofisica e Vulcanologia

Salvatore Stramondo

Istituto Nazionale di Geofisica e Vulcanologia

Emanuela Falcucci

Istituto Nazionale di Geofisica e Vulcanologia

Stefano Gori

Istituto Nazionale di Geofisica e Vulcanologia

Matteo Albano

Istituto Nazionale di Geofisica e Vulcanologia

Christian Bignami

Istituto Nazionale di Geofisica e Vulcanologia

Fabrizio Galadini

Istituto Nazionale di Geofisica e Vulcanologia

S. Barba

Istituto Nazionale di Geofisica e Vulcanologia

Marco Polcari

Istituto Nazionale di Geofisica e Vulcanologia

Michele Lancia

Southern University of Science and Technology

Cooperative Institutions

Istituto Nazionale di Geofisica e Vulcanologia

138

Sapienza University of Rome

National Research Council

Centre National de la Recherche Scientifique

Institute of Environmental Geology and Geoengineering

University of Chieti-Pescara

Roma Tre University

Radiotelevisione Italiana (Italy)

Università degli studi di Cassino e del Lazio Meridionale

Istituto Superiore per la Protezione e la Ricerca Ambientale

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Water-table and discharge changes associated with the 2016–2017 seismic sequence in central Italy: hydrogeological data and a conceptual model for fractured carbonate aquifers

Hydrogeology Journal (2018)

Marco Petitta Lucia Mastrorillo Elisabetta Preziosi Francesca Banzato Marino Domenico Barberio

A seismic sequence in central Italy from August 2016 to January 2017 affected groundwater dynamics in fractured carbonate aquifers. Changes in spring discharge, water-table position, and streamflow were recorded for several months following nine Mw 5.0–6.5 seismic events. Data from 22 measurement sites, located within 100 km of the epicentral zones, were analyzed. The intensity of the induced changes were correlated with seismic magnitude and distance to epicenters. The additional post-seismic discharge from rivers and springs was found to be higher than 9 m3/s, totaling more than 0.1 km3 of groundwater release over 6 months. This huge and unexpected contribution increased streamflow in narrow mountainous valleys to previously unmeasured peak values. Analogously to the L'Aquila 2009 post-earthquake phenomenon, these hydrogeological changes might reflect an increase of bulk hydraulic conductivity at the aquifer scale, which would increase hydraulic heads in the discharge zones and lower them in some recharge areas. The observed changes may also be partly due to other mechanisms, such as shaking and/or squeezing effects related to intense subsidence in the core of the affected area, where effects had maximum extent, or breaching of hydraulic barriers.

Hydraulic head

10.1007/s10040-017-1717-7

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Sustained post‐seismic effects on groundwater flow in fractured carbonate aquifers in Central Italy

Hydrological Processes (2019)

Lucia Mastrorillo Michele Saroli Stefano Viaroli Francesca Banzato Daniela Valigi

Abstract A sustained increase in spring discharges was monitored after the 2016 Central Italy seismic sequence in the fractured carbonate aquifer of Valnerina–Sibillini Mts. The groundwater surplus recorded between August 2016 and November 2017 was determined to be between 400 and 500 × 10 6 m 3 . In fractured aquifers, the post‐seismic rise in spring discharges is generally attributed to an increase in bulk permeability caused by the fracture cleaning effect, which is induced by pore pressure propagation. In the studied aquifers, the large amount of additional discharge cannot only be attributed to the enhanced permeability, which was evaluated to be less than 20% after each main seismic event. A detailed analysis of the spring discharge hydrographs and of the water level at five gauging stations was carried out to determine the possible causes of this sudden increase in groundwater outflow. Taking into account the geological and structural framework, a conceptual model of a basin‐in‐series has been adopted to describe the complex hydrogeological setting, where the thrusts and extensional faults have clearly influenced the groundwater flow directions before and after the seismic sequence. The prevalent portion of the total post‐seismic discharge surplus not explained by the increase in permeability has been attributed to changes in the hydraulic gradient that caused seismogenic fault rupture and the disruption in the upgradient sector of the aquifer. The additional flow calculated through the breach of the pre‐existing hydrostructural barrier corresponds to approximately 470 × 10 6 m 3 . This value is consistent with the total discharge increase measured in the whole study area, validating the proposed conceptual model. Consequently, a shift in the piezometric divide of the hydrogeological system has been induced, causing a potentially permanent change that lowers the discharge amount of the eastern springs.

Groundwater discharge

10.1002/hyp.13662

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Step-like displacements of a deep seated gravitational slope deformation observed during the 2016–2017 seismic events in Central Italy

Engineering Geology (2018)

Gabriele Amato R. Devoti Giandomenico Fubelli Domenico Aringoli Christian Bignami

10.1016/j.enggeo.2018.10.014

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Surface movements in Bologna (Po Plain — Italy) detected by multitemporal DInSAR

Remote Sensing of Environment (2007)

Salvatore Stramondo Michele Saroli Cristiano Tolomei Marco Moro Fawzi Doumaz

Levelling

10.1016/j.rse.2007.02.023

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Citations (108)

Evidence for Late Pleistocene-Holocene Activity along a Potential Seismic Source in southern Apennines (Italy)

AGU Fall Meeting Abstracts (2003)

Marco Moro L. Amicucci F. R. Cinti D. Fawzi P. Montone

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Setting new tools to quantify the tectonic and gravity contribution in seismogenic areas

Marco Moro Michele Saroli Stefano Salvi Stefano Gori Emanuela Falcucci

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Quaternary tectonics of the abruzzi Appennines (Italy) inferred from integrated geomorfological-stratigraphic data

Paolo Messina F. Dramis Fabrizio Galadini Emanuela Falcucci Biagio Giaccio

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DInSAR techniques for studying the October 23, 2011, Van earthquake (Turkey), and its relationship with neighboring structures

Christian Bignami Carlo Alberto Brunori Marco Chini Valentina Cannelli C. Kyriakopoulos

In October 2011 a strong earthquake hit the Van province, Eastern Turkey. Few days later (November 9 ^th ) an aftershock occurred few km southward. Finally in November 1976 another mainshock took place north of Van along the Caldiran fault. We have investigated the possible relations between 2011 mainshock and aftershock and the link with the 1976 earthquake. In order to complete the work SAR interferometry has been applied to measure surface displacements, while the fault geometries of the mainshock have been retrieved using a Simulated Annealing approach. Moreover the CFF has been calculated to evaluate the role of 1976 earthquake in promoting the 2011 mainshock and, later on, the role of this latter respect to the aftershock in November 9 ^th , 2011.

10.1109/tywrrs.2012.6381094

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An innovative procedure for monitoring the change in soil seismic response by InSAR data: application to the Mexico City subsidence

International Journal of Applied Earth Observation and Geoinformation (2016)

Matteo Albano Marco Polcari Christian Bignami Marco Moro Michele Saroli

Ground subsidence

10.1016/j.jag.2016.08.011

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First evidence of the Late Pleistocene—Holocene activity of the Roveto Valley Fault (Central Apennines, Italy)

Frontiers in Earth Science (2022)

Deborah Maceroni Girolamo Dixit Dominus Stefano Gori Emanuela Falcucci Fabrizio Galadini

We investigated the Late Quaternary activity of a major, crustal fault affecting the southern sector of Central Apennines, i.e., the Roveto Valley Fault (also known as Liri Valley fault). This sector of the chain was hit by numerous M>5 historical seismic events. For some of these, e.g., the 1654 one (M w 6.33), the causative seismogenic source has never been conclusively defined. Within this seismotectonic framework, the recent activity of the Roveto Valley Fault is still a matter of debate. Some authors defined its activity as ended in the Middle Pleistocene; others considered it as currently active and seismogenic at least in its southern portion. We collected new geologic and geomorphologic data along the eastern (left) flank of the Roveto Valley, where the fault crops out, and we identified evidence of displacement of alluvial fans that we attributed to the Early, Middle, and Late Pleistocene. Moreover, the analysis of the relationship between colluvial/detrital deposits, chronologically constrained by means of radiocarbon dating, allowed us to define the activation of the Roveto Valley fault also during historical times, that is, over the past few centuries. Evidence of this has been collected along a large sector of the fault trace for a length of some tens of kilometres. The results of our studies contribute to improve the knowledge of the seismotectonic setting of a large sector of the Central Apennines. Indeed, proving the current activity of the Roveto Valley fault casts new light on possible seismogenic sources of major seismicity of central Italy, potentially responsible for severe damage over a wide area and to relevant cities, Rome being among them.

Alluvial fan

Colluvium

10.3389/feart.2022.1018737

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Citations (3)