Combined approach of poroelastic and earthquake nucleation applied to the reservoir-induced seismic activity in the Val d’Agri area, Italy

Rinaldi, Antonio Pio; Improta, Luigi; Hainzl, Sebastian; Catalli, Flaminia; Urpi, Luca; Wiemer, Stefan

doi:10.1016/j.jrmge.2020.04.003

Cited by 18 publications

(12 citation statements)

References 30 publications

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“…The system of faults close to the southern part of the Pertusillo lake exhibits different strike (both NW-SE and NE-SW) and faulting styles. Our results confirm, in agreement with Rinaldi et al (2020), that the Pertusillo Lake played a crucial role in the generation of earthquakes during period # 1. Likely, both the orientation of faults with respect to the regional tectonic stress (i.e., the minimum horizontal stress axis oriented N032; Bello et al, 2022), and their style are responsible for the relative high stress drops, Δσ, (i.e., higher δBe and lower b-values) of these events with respect to the other swarm.…”

Section: Discussionsupporting

confidence: 92%

“…Indeed, it seems that the valley delimiting the lake constitutes a structural lineament parallel to this fault, whose protraction underlays the lake itself. The southern part of the valley is also characterized by the presence of geological structures which constrain current physical models that try to explain RIS at Pertusillo Lake (e.g., Rinaldi et al, 2020): a set of northeast-striking tear faults extend from the lake to the southwest, as imaged by Stabile et al (2014) using earthquake locations.…”

Section: Tectonic Settingmentioning

confidence: 99%

“…Stabile et al (2014) suggested a 1D pore-fluid pressurediffusion mechanism acting from the reservoir toward the MMFS as the main physical driving mechanism of RIS in the Pertusillo artificial lake, with an average hydraulic diffusivity of ~7.8 m 2 /s. Recently, Rinaldi et al (2020) presented a first attempt to model RIS at the Pertusillo lake, considering both the static Coulomb failure stress changes and a rate-and-state model for investigating the temporal evolution correlation. Their work confirmed that the MMFS is favorably oriented with respect to the water loading to receive a positive stress change to trigger seismicity.…”

Section: Introductionmentioning

confidence: 99%

“…Their work confirmed that the MMFS is favorably oriented with respect to the water loading to receive a positive stress change to trigger seismicity. We will return to the modelling results obtained by Rinaldi et al (2020) later in this work.…”

Section: Introductionmentioning

confidence: 99%

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Spatio-temporal evolution of ground motion intensity caused by reservoir-induced seismicity at the Pertusillo artificial lake (southern Italy)

2022

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We investigate the spatiotemporal evolution of ground motion caused by reservoir-induced seismicity at the Pertusillo artificial lake in southern Italy. The area has a strong seismogenic potential, having been affected in the past by the 1857, Mw 7.0 Basilicata earthquake. We consider ∼1,000 microearthquakes that occurred from 2001 to 2018 and were recorded by a local network of nine seismic stations. The ground motion intensity associated with microseismicity allows us to identify two periods, each lasting approximately 2 years. They are characterized by a high rate of events but exhibit different source properties and spatial distributions. In the first period, the seismicity is spatially clustered close to the lake, on faults with different orientations and kinematics. In the second period, the seismicity is distributed along the Monti della Maddalena faults. Comparing the ground motion intensities of the two periods, we observe that events that occurred in the first period are associated with higher stress levels than others, in agreement with the b-values of the respective frequency-magnitude distributions. We compare the temporal evolution of the ground motion intensity with the rainfall and water levels measured at the artificial lake, as well as with the discharge of a ∼80 km distant spring, which is strictly controlled by climate trends. The results provide information about the regional processes acting on the southern Apennines. Our results show that the microseismicity is clearly associated with the Pertusillo artificial lake in the first period, whereas in the second period is a result of a combination of local effects due to water table oscillations of the lake itself, regional tectonics, and the poroelastic and elastic phenomena associated with carbonate rocks hosting aquifers.

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Section: Discussionsupporting

confidence: 92%

Section: Tectonic Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatio-temporal evolution of ground motion intensity caused by reservoir-induced seismicity at the Pertusillo artificial lake (southern Italy)

2022

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“…Discriminating induced or triggered seismicity related to industrial activities from natural seismicity has been a highly debated subject. Since the beginning of the last century, many earthquakes associated with anthropogenic activities have been reported, and the number of cases has been increasing due to the expanding man-made operations, such as gas and oil production, wastewater injection, mining, geothermal operations, and water impoundment (Dahm et al, 2010;Rinaldi et al, 2020). The most recent, outstanding cases debating potential induced or triggered seismicity, attracting societal interest, include the 2011 M w 5.7 and 2016 M w 5.8 Oklahoma earthquake sequences (Ellsworth, 2013;Keranen et al, 2013Keranen et al, , 2014Walsh and Zoback, 2015;Manga et al, 2016;Yeck et al, 2016Yeck et al, , 2017, the 2012 M w 6.1 and 5.9 Emilia, Italy, earthquakes (Cesca et al, 2013a;Dahm et al, 2015;Juanes et al, 2016), the 2017 M w 5.5 Pohang, South Korea, earthquake (Grigoli et al, 2018;Kim et al, 2018), the 2011 M w 5.1 Lorca, Spain, earthquake (González et al, 2012;Martínez-Díaz et al, 2012), the 2013 M w 4.3 Castor, Spain, earthquake sequence (Cesca et al, 2014;Gaite et al, 2016;Villaseñor et al, 2020), and the 2012 M L 3.6 Huizinge earthquake at the Groningen gas field (Richter et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Reservoir-Triggered Earthquakes Around the Atatürk Dam (Southeastern Turkey)

et al. 2021

Self Cite

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Reservoir-triggered seismicity has been observed near dams during construction, impoundment, and cyclic filling in many parts of the earth. In Turkey, the number of dams has increased substantially over the last decade, with Atatürk Dam being the largest dam in Turkey with a total water capacity of 48.7 billion m3. After the construction of the dam, the monitoring network has improved. Considering earthquakes above the long-term completeness magnitude of MC = 3.5, the local seismicity rate has substantially increased after the filling of the reservoir. Recently, two damaging earthquakes of Mw 5.5 and Mw 5.1 occurred in the town of Samsat near the Atatürk Reservoir in 2017 and 2018, respectively. In this study, we analyze the spatio-temporal evolution of seismicity and its source properties in relation to the temporal water-level variations and the stresses resulting from surface loading and pore-pressure diffusion. We find that water-level and seismicity rate are anti-correlated, which is explained by the stabilization effect of the gravitational induced stress imposed by water loading on the local faults. On the other hand, we find that the overall effective stress in the seismogenic zone increased over decades due to pore-pressure diffusion, explaining the enhanced background seismicity during recent years. Additionally, we observe a progressive decrease of the Gutenberg-Richter b-value. Our results indicate that the stressing rate finally focused on the region where the two damaging earthquakes occurred in 2017 and 2018.

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An efficient phase-field model of shear fractures using deviatoric stress split

Haghighat

Santillán

2023

Comput Mech

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We propose a phase-field model of shear fractures using the deviatoric stress decomposition. This choice allows us to use general three-dimensional Mohr–Coulomb’s failure function for formulating the relations and evaluating peak and residual stresses. We apply the model to a few benchmark problems of shear fracture and strain localization and report remarkable performance. Our model is able to capture conjugate failure modes under biaxial compression test and for the slope stability problem, a challenging task for most models of geomechanics.

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Combined approach of poroelastic and earthquake nucleation applied to the reservoir-induced seismic activity in the Val d’Agri area, Italy

Cited by 18 publications

References 30 publications

Spatio-temporal evolution of ground motion intensity caused by reservoir-induced seismicity at the Pertusillo artificial lake (southern Italy)

Spatio-temporal evolution of ground motion intensity caused by reservoir-induced seismicity at the Pertusillo artificial lake (southern Italy)

Reservoir-Triggered Earthquakes Around the Atatürk Dam (Southeastern Turkey)

An efficient phase-field model of shear fractures using deviatoric stress split

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