Séminaire ISTerre

Remote sensing and wireless techniques to identify and monitor slope instabilities in the Himalaya

lundi 28 septembre 2020 - 11h00
Benedetta Dini  - Schoool of Environmental Sciences, University of East Anglia, Norwich, UK
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The presentation is structured in two parts, each targeting different studies and different aspects of hazardous landslide detection and monitoring with different techniques in two different Himalayan countries. The first part focuses on a large-scale study in the Himalaya of Bhutan by means of remote sensing techniques (optical images and Synthetic Aperture Radar Differential Interferometry - DInSAR). This study revealed the presence of large, slow moving rock slope instabilities that, in some cases, threaten a growing, yet fragile infrastructure. The analysis, based on the generation and inspection of more than 500 individual interferograms and of time series from different sensors, allowed the generation of a likelihood of activity map of previously unknown instabilities and the identification of areas of reversible displacements associated with permafrost or ground water table variations. An interesting case was also brought to light by this analysis, in which a hydropower dam and a deep-seated landslide interact dangerously, reinforcing the idea that DInSAR should be considered as a powerful technique to be routinely implemented to evaluate the suitability of a site for large engineering projects. The second part of the presentation covers a pilot study concerning the potential of the Internet of Things in the context of landslide early warning systems. Recently, a network of LoRa wireless sensors, equipped with GPS and accelerometer, was installed in the upper Bhote Koshi catchment in northeastern Nepal. The aim of the network is to capture in real time hazardous boulder movements that during the monsoon may amplify landslide and flood hazard in a disaster-prone area. This novel approach has produced promising results in capturing the movement of the tagged boulders in real-time and has the potential in the future to be integrated in cost-effective monitoring and early warning systems.

Equipe organisatrice : Géophysique des risques sismiques et gravitaires

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

“Minimalist seismology”: studying earthquakes with sparse instrumentation

jeudi 17 septembre 2026 - 11h00

Mathieu Causse - ISTerre

Equipe organisatrice : Organisation labo

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Stable‑to‑dynamic expansion of fault slipping area through fluid injection observed in laboratory experiments using a sub‑meter scale specimen

vendredi 18 septembre 2026 - 14h00

Takatoshi Ito  - Université de Tohoku, Japan

Equipe organisatrice : Mécanique des failles

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Tectonics, Mantle Dynamics and Coupled Lithosphere-Mantle-Core Evolution of Earth and Other Rocky Worlds

jeudi 24 septembre 2026 - 11h00

Paul Tackley - ETH Zurich

Equipe organisatrice : Grands Séminaires ISTerre

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Tectonics, Mantle Dynamics and Coupled Lithosphere-Mantle-Core Evolution of Earth and Other Rocky Worlds

jeudi 24 septembre 2026 - 11h00

Paul Tackley - ETH Zurich

Equipe organisatrice : Grands Séminaires ISTerre

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Apport des expériences analogiques pour la modélisation et le suivi en temps réel de la propagation du magma en profondeur : Exemple du Rift Est Africain

jeudi 1er octobre 2026 - 11h00

Virginie Pinel - ISTerre

Equipe organisatrice : Organisation labo

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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A t-on encore besoin de plaques pour expliquer la tectonique de la vallée du Rhône et des Alpes Occidentales ?

vendredi 2 octobre 2026 - 11h00

philippe VERNANT - Geosciences Montpellier

Equipe organisatrice : Tectonique active et sismicité

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères

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TBA

vendredi 2 octobre 2026 - 14h00

Hugo Boulze - 

Equipe organisatrice : Cycle sismique et déformations transitoires

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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TBA

vendredi 9 octobre 2026 - 11h00

Eric Beaucé - ISTerre

Equipe organisatrice : Cycle sismique et déformations transitoires

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères

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TBA

vendredi 20 novembre 2026 - 11h00

Farzaneh Mohammadi - ENS Paris

Equipe organisatrice : Cycle sismique et déformations transitoires

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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