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Séminaire ISTerre
Imaging the Near Surface: Can Full Waveform Inversion and Deep Learning Help?
mardi 12 novembre 2024 - 15h00
Dr. Gabriel Fabien-Ouellet - Assistant Professor, Polytechnique Montréal---
The near surface has a wide societal impact: it is the interface with the built infrastructure and hosts important resources such as groundwater and minerals. Seismic imaging is one of the most powerful techniques to image and monitor the subsurface, supporting applications in geotechnical engineering, hydrogeology, seismic microzonation, and carbon capture and storage monitoring. However, advanced methods like Full Waveform Inversion (FWI), despite their potential, are rarely applied to the near surface due to significant challenges. This presentation explores new perspectives and developments aimed at overcoming these obstacles to make FWI a viable tool for near-surface imaging and monitoring. A key challenge is the high attenuation in unconsolidated or weathered formations, which necessitates computationally intensive multiparameter viscoelastic inversion. One promising approach to reduce the complexity of viscoelastic FWI is the integration of deep learning techniques. We will review recent advancements in applying deep learning within the FWI framework, as well as the key challenges that must be addressed for realistic implementation. To illustrate these advancements, we will showcase the application of deep learning-based seismic inversion for imaging subsea permafrost. Additionally, we will discuss the potential of FWI-guided deep learning for subsurface monitoring, particularly in conjunction with emerging technologies such as Distributed Acoustic Sensing (DAS) and seismic interferometry.
Equipe organisatrice : Ondes et structures
Séminaire uniquement en visio
Informations de visio :
“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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