Integrated geophysical and geological surveys reveal new details of the large Montescaglioso (southern Italy) landslide of December 2013

Calamita, Giuseppe; Gallipoli, Maria Rosaria; Gueguen, E.; Sinisi, Rosa; Summa, Vito; Vignola, Luigi; Stabile, Tony Alfredo; Bellanova, Jessica; Piscitelli, S.; Perrone, Angela

doi:10.1016/j.enggeo.2023.106984

Cited by 13 publications

(4 citation statements)

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“…Emphasizing the broader significance of this research, it is important to recognize the global relevance of advancing our understanding of landslide dynamics through combining geophysical methodologies. Comparable studies conducted worldwide [36,[64][65][66] underscore the universal importance of unraveling subsurface complexities for effective hazard assessment and mitigation strategies [35]. By aligning our efforts with a global context, we contribute to the collective knowledge that integrates geophysical and geodetic methods in landslide research and management on an international scale.…”

Section: Discussionmentioning

confidence: 92%

“…This multi-methodological approach allows us to capture details of its sliding surface geometry, enabling a more accurate representation of the complex interactions between lithological factors, topography, and historical human activities that contribute to the ongoing evolution of the Heinzenberg landslide [5,16]. Our emphasis on combining these advanced geophysical techniques underscores the significance of a holistic methodology in contemporary landslide research [35,36], aligning with global efforts to enhance the robustness of landslide characterization.…”

Section: Introductionmentioning

confidence: 99%

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Integrating Seismic Methods for Characterizing and Monitoring Landslides: A Case Study of the Heinzenberg Deep-Seated Gravitational Slope Deformation (Switzerland)

Glueer,

Mreyen,

Cauchie

et al. 2024

Geosciences

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While geodetic measurements have long been used to assess landslides, seismic methods are increasingly recognized as valuable tools for providing additional insights into subsurface structures and mechanisms. This work aims to characterize the subsurface structures of the deep-seated gravitational slope deformation (DSGSD) at Heinzenberg through the integration of active and passive seismic measurements. Seismic techniques can hereby deliver additional information on the subsurface structure and mechanisms involved, e.g., the degree of rock mass degradation, the resonant frequencies of the potentially unstable compartments, and the local fracture network orientations that are influenced by wavefield polarization. By employing advanced methods such as H/V analysis, site-to-reference spectral ratios, polarization analysis, surface wave analysis, and the joint multizonal transdimensional Bayesian inversion of velocity structures, we establish a comprehensive baseline model of the landslide at five selected sites. This baseline model shall help identify potential changes after the refilling of Lake Lüsch, which started in 2021. Our results reveal the rupture surface of the DSGSD at various depths ranging from 30 m at the top to over 90 m in the middle of the slope. Additionally, we estimate key parameters including the shear wave velocities of the different rock masses. The 2D geophysical profiles and rock mass properties contribute to the understanding of the subsurface geometry, geomechanical properties, and potential water pathways. This study demonstrates the significance of integrating seismic methods with traditional geodetic measurements and geomorphologic analysis techniques for a comprehensive assessment of landslides, enhancing our ability to monitor and mitigate hazardous events.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Integrating Seismic Methods for Characterizing and Monitoring Landslides: A Case Study of the Heinzenberg Deep-Seated Gravitational Slope Deformation (Switzerland)

Glueer,

Mreyen,

Cauchie

et al. 2024

Geosciences

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“…in the Mount cam area of An Giang Province, Vietnam, on the road from nui cam to chua Van Linh, geophysical surveys, in conjunction with other standard geological surveys, have identified structural sites that are prone to landslides. The tests performed are the basis for undertaking engineering projects aimed at the construction of structures preventing traffic hazards on the above-mentioned road [5,16].…”

Section: Discussionmentioning

confidence: 99%

Landslide Survey at Cam Mountain (An Giang, Vietnam) by Seismic Refraction and GPR Methods

2023

Archives of Mining Sciences

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LandsLide survey at Cam mountain (an GianG, vietnam) by seismiC refraCtion and GPr methodscam Mountain in An Giang Province, Vietnam, is a granite peak that is severely fractured and eroded on its slopes and summit. Trees cover the top of the mountain and around the side of the mountain. The roads are the primary means of transportation for indigenous people and tourists daily. Recently, there has been a phenomenon of large-sized boulders rolling down from the top of the mountain, causing an accident and killing tourists. To investigate the internal causes of landslides on a 2.3 km road stretch, geophysical profiles using GPR and seismic refraction methods were conducted to clarify the current status of geological structures beneath the road surface. The refractive seismic data analysis revealed four distinct layers based on elastic wave propagation velocity. Velocity values range from 1000 to 3000 m/s for the 2 upper layers corresponding to the weathered, broken, and highly fractured rock layers and in the lower 2 layers from 3000 to more than 4500 m/s, respectively corresponding to less fractured rock on the depth of more than 50 m. According to GPR data, the structural cross-section to an average depth of 30 m is a more complex picture. Detected 6 layers with different degrees of fracture cracking and showing different structural zones. in a few places are the drainage creeks from the mountain. These places need to be monitored regularly to have a basis for predicting landslides and rockfalls in the area of cam Mountain. Landslides occur in geological rocks which are of different ages: claystone, mudstone, siltstone, shale, or marlstone. The rock-falls occur in more compact rocks: metamorphic or igneous rocks.

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“…For analysis of correlation and links between diverse geologic and geophysical variables, matched feature points and continued fields represented on the maps should maintain similar regional appearance as well as relative spatial relationships with other processes, e.g., variation in topography or geoid and regional distribution of the geologic units. Analysis of correlation between geophysical and geological variables has extensive uses in integrated geophysical and seismic analysis [1], hydrological and engineering geological studies [2][3][4], geophysical anomalies [5], mineral exploration [6], or landslide hazard risk assessment in the areas with complex geology [7,8].…”

Section: Introduction 1backgroundmentioning

confidence: 99%

Coherence of Bangui Magnetic Anomaly with Topographic and Gravity Contrasts across Central African Republic

Lemenkova

Debeir

2023

Minerals

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The interactions between the geophysical processes and geodynamics of the lithosphere play a crucial role in the geologic structure of the Earth’s crust. The Bangui magnetic anomaly is a notable feature in the lithospheric structure of the Central African Republic (CAR) resulting from a complex tectonic evolution. This study reports on the coherence in the geophysical data and magnetic anomaly field analysed from a series of maps. The data used here include raster grids on free-air altimetric gravity, magnetic EMAG2 maps, geoid EGM2008 model and topographic SRTM/ETOPO1 relief. The data were processed to analyse the correspondence between the geophysical and geologic setting in the CAR region. Histogram equalization of the topographic grids was implemented by partition of the raster grids into equal-area patches of data ranged by the segments with relative highs and lows of the relief. The original data were compared with the equalized, normalized and quadratic models. The scripts used for cartographic data processing are presented and commented. The consistency and equalization of topography, gravity and geoid data were based using GMT modules ‘grdfft’ and ‘grdhisteq’ modules. Using GMT scripts for mapping the geophysical and gravity data over CAR shows an advanced approach to multi-source data visualization to reveal the relationships in the geophysical and topographic processes in central Africa. The results highlighted the correlation between the distribution of rocks with high magnetism in the central part of the Bangui anomaly, and distribution of granites, greenstone belts, and metamorphosed basalts as rock exposure. The correspondence between the negative Bouguer anomaly (<−80 mGal), low geoid values (<−12 m) and the extent of the magnetic anomaly with extreme negative values ranging from −1000 to −200 nT is identified. The integration of the multi-source data provides new insights into the analysis of crustal thicknesses and the average density of the Earth in CAR, as well as the magnitude of the magnetic fields with notable deviations caused by the magnetic flux density in the Bangui area related to the distribution of mineral resources in CAR.

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Integrated geophysical and geological surveys reveal new details of the large Montescaglioso (southern Italy) landslide of December 2013

Cited by 13 publications

References 64 publications

Integrating Seismic Methods for Characterizing and Monitoring Landslides: A Case Study of the Heinzenberg Deep-Seated Gravitational Slope Deformation (Switzerland)

Integrating Seismic Methods for Characterizing and Monitoring Landslides: A Case Study of the Heinzenberg Deep-Seated Gravitational Slope Deformation (Switzerland)

Landslide Survey at Cam Mountain (An Giang, Vietnam) by Seismic Refraction and GPR Methods

Coherence of Bangui Magnetic Anomaly with Topographic and Gravity Contrasts across Central African Republic

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