Geophysical surveys to study a landslide body (north-eastern Sicily)

Imposa, Sebastiano; Grassi, Sabrina; Fazio, Francesco; Rannisi, G.; Cino, P.

doi:10.1007/s11069-016-2544-1

Cited by 51 publications

(24 citation statements)

References 22 publications

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“…One study by Grandjean et al () used SR monitoring, and a study by Bièvre et al () utilized SW monitoring methods. In total, 31 case studies are identified as using passive seismic methods: Amitrano et al (), Brückl and Mertl (), Brückl et al (), Gomberg et al (), Harba and Pilecki (), Imposa et al (), Mainsant et al (), Palis, Lebourg, Vidal, et al (), Provost et al (), Renalier, Jongmans, et al (), Tonnellier et al (), Walter and Joswig (), Walter et al (), Walter et al (), Walter et al (), and Walter et al ().…”

Section: Geophysical Monitoring Of Landslides: Methods and Case Studiesmentioning

confidence: 99%

“…Six controlled tests were described in five publications: Grandjean et al (), Jomard et al (), Lehmann et al (), Travelletti et al (), and Colangelo et al (). Transient measurements : Typically involved the deployment of instruments for the duration of a single data set acquisition, after which the instrumentation was removed from the field before being deployed again in the same location after a period of time. Monitoring periods varied greatly, with the shortest recorded as 62 days (Lucas et al, ) and the longest as 1589 days (Imposa et al, ). In both of these studies, six data sets were acquired over the monitoring period, highlighting the variability in acquisition frequency that can accompany a transient measurement approach. Short‐term installations : Utilize equipment installed and left in the field, but for shorter periods than semipermanent installations.…”

Section: Geophysical Monitoring Of Landslides: Methods and Case Studiesmentioning

confidence: 99%

“…Imposa et al () utilized a transient measurement approach, using a sensor specifically designed for the acquisition of S‐H/V readings. These readings were acquired at the same stations in two separate surveys separated by five years.…”

Section: Geophysical Monitoring Of Landslides: Methods and Case Studiesmentioning

confidence: 99%

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Geophysical Monitoring of Moisture‐Induced Landslides: A Review

Whiteley

Chambers

Uhlemann

et al. 2019

Reviews of Geophysics

203

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Geophysical monitoring of landslides can provide insights into spatial and temporal variations of subsurface properties associated with slope failure. Recent improvements in equipment, data analysis, and field operations have led to a significant increase in the use of such techniques in monitoring. Geophysical methods complement intrusive approaches, which sample only a very small proportion of the subsurface, and walk-over or remotely sensed data, which principally provide information only at the ground surface. In particular, recent studies show that advances in geophysical instrumentation, data processing, modeling, and interpretation in the context of landslide monitoring are significantly improving the characterization of hillslope hydrology and soil and rock hydrology and strength and their dynamics over time. This review appraises the state of the art of geophysical monitoring, as applied to moisture-induced landslides. Here we focus on technical and practical uses of time-lapse methods in geophysics applied to monitoring moisture-induced landslide. The case studies identified in this review show that several geophysical techniques are currently used in the monitoring of subsurface landslide processes. These geophysical contributions to monitoring and predicting the evolution of landslide processes are currently underrealized. Hence, the further integration of multiple-parametric and geotechnically coupled geophysical monitoring systems has considerable potential. The complementary nature of certain methods to map the distribution of subsurface moisture and elastic moduli will greatly increase the predictive and monitoring capacity of early warning systems in moisture-induced landslide settings. Figure 4. The geophysical methods identified in the 31 case studies, shown by mode of acquisition and method. The acronyms for each method are shown in the lower boxes.

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Section: Geophysical Monitoring Of Landslides: Methods and Case Studiesmentioning

confidence: 99%

Section: Geophysical Monitoring Of Landslides: Methods and Case Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Geophysical Monitoring of Moisture‐Induced Landslides: A Review

Whiteley

Chambers

Uhlemann

et al. 2019

Reviews of Geophysics

203

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“…Yawar Hussain; Hernan Martinez-Carvajal; Martin Cárdenas-Soto; Rogério Uagoda; Salvatore Martino & Muhammad B. Hussain This technique is based on an idea that frequencydependent ellipticity of surface wave motion can be explained by the shape of HVSR curve (Benjumea et al, 2016) and for determining the resonance of soil deposit over basement was given by Nogoshi & Igarashi (1970, 1971. This technique has been revised after the work of Nakamura, (2008) and now it is considered as a suitable technique for earthquake hazards assessments through microzoation (Di Giulio et al, 2014), to bedrock depth estimation (García-Jerez et al, 2007;Gosar & Lenart, 2010;Ullah et al, 2016) as well as its utilization in archeology is also well established (Kalil et al, 2016) and landslide studies, slip surface and volume estimations are other accepts of its applications (Del Gaudio et al, 2008;Pazzi et al, 2016;Imposa et al, 2017).…”

Section: Hvsrmentioning

confidence: 99%

Resposta em Microtremor de um Movemento de Massa no Distrito Federal, Brasil

et al. 2017

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The present study provides a brief description of the ambient noise recorded at a slow moving mass movement in Ribeirão Contagem Basin. The area is an interesting natural laboratory as river detachment processes in a number of different stages can be identified and are easily accessible. We investigate the site dynamic characteristics of the study area by recording ambient noise time-series at nine points, using portable nine three-component short period seismometers. The time-series are processed to give both horizontal to vertical spectral ratio (HVSR) curves as well as time-frequency plots of noise power spectral density (SPD). The HVSR curves illustrate and quantify aspects of site resonance effects due to the local geological setting. Probability density function (PDF) shows that noise level lies well between new high noise model (NHNM) and new lower noise model (NLNM) and their probabilities are higher above 2 Hz. HVSR curves present a uniform lithologically controlled peak at 2 Hz. Directional properties of the wavefield are determined by beamforming method. The f-k analysis results in the E-W component show that at 5 Hz phase velocities are close to 1700 m/s while at 10 Hz dropped to 250 m/s. We observed that between 5 and 16 Hz the incoming wavefield arrive from 260 degrees. Further studies will apply a detailed noise analysis for relating the dynamics of the landslide (which can be retriggered by river erosion as well as rainfalls and seismic shaking) to possible changes in detectable physical properties. Keywords: Seismic noise; Power Spectral Density; Probability Density Function; HVSR; f-k analysis ResumoO estudo apresentado fornece uma ampla descrição do ruído ambiental registrado de um deslizamento de encosta lento localizado na bacia do Ribeirão Contagem no Distrito Federal. A área de estudo é um laboratório natural na medida que os processos erosivos do rio podem ser analisados em diferentes estágios de evolução dentro de um setor de fácil acesso. A pesquisa abrange o estudo das características dinâmicas da área por meio do registro das séries temporais do ruído ambiental em nove pontos mediante o uso de sismómetros de período curto e três componentes. As series temporais são processadas para obter as curvas de relação espectral horizontal-vertical (HVSR) e também os gráficos tempo:frequência dos espectros de potência (SPD). As curvas HVSR ilustram e quantificam aspectos dos efeitos de ressonância local devidos ao ambiente geológico. A função de desnsidade de probabilidade (PDF) mostra que os níveis de ruído registrados estão enquadrados entre os limites conhecidos como NHNM (new high noise model) e NLNM (new lower noise model) e que suas probabilidades são maiores acima de 2 Hz. As curvas HVSR apresentam um pico de resposta uniforme litológicamente controlado a 2 Hz. As propriedades direcionais do campo de ondas são determinadas pelo método da viga (beamforming method). A análise dos resultados na componente EW indica que na fase de 5 Hz a velocidade está próxima de 1700 m/s enquanto qu...

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“…Nappi et al (2017a, b) present the geologic-geomorphologic ground effects due to the strong 1743 Salento earthquake with the main aim to provide a positive contribution to the seismic hazard assessment of the Salento Peninsula (Apulia, southern Italy) which, despite the occurrence of several moderate-to-large earthquakes, is not considered as an area with high seismic hazard. Several papers in this special issue describe the use of geophysical applications and techniques to address hydrogeological risks such as landslides (Imposa et al 2017;Capuano et al 2017), evaluation of seismic site response Albarello et al 2017), and the evaluation of ground subsidence in historical city centers (Leucci et al 2017). Capuano et al (2017) propose a new procedure to analyze continuous seismic volcano-tectonic events throughout the insurgence of seismic activity.…”

mentioning

confidence: 99%