Séminaire ISTerre

Analysis of multidisciplinary signals with deep learning for the anticipation of eruptions at Piton de la Fournaise

mercredi 20 novembre 2024 - 11h00
Matthieu Nougaret - 
--- 
Monitoring the activity of volcanic edifices is central to the mitigation of volcanic risks and hazards. Various methods, mostly relying on monitoring geophysical signals such as seismicity and ground deformation, are used on many volcanoes around the world. These monitoring methods generate large amounts of data. This represents a challenge for real-time analysis. For now, volcano observatories use automatic alerts, for instance triggered when seismic activity reaches a threshold such as at Piton de la Fournaise volcano, La Réunion island, France or at Colima volcano, Mexico. Multivariate data analysis may allow refining such monitoring tools and could be key to improve eruption forecasting and management. Machine learning may be a key method to perform multivariate analysis of time series recorded by volcano observatories. Its use could bring new insights and understanding and help better anticipating eruptions. Indeed, machine learning algorithms are particularly effective in analysing time series and detecting anomalies, such as it is done in other sectors to detect for instance bank frauds or network intrusions. During my thesis, I am testing if and how signals from seismicity, ground deformation and CO2 degassing can be combined with the help of deep learning to detect and forecast volcanic eruptions at Piton de la Fournaise. The idea behind is also to leverage possible unknow correlations between geophysical and geochemical signals. I have tested unsupervised anomaly detection as a proxy to detect possible pre-eruptive signals. Based on the results of this method, I have built a supervised neural network to achieve the classification of time series to detect precursory signals. Finally, I tested time series prediction to help at the anticipation and forecast eruptions. For this purpose, I trained different artificial neural networks to make predictions on the evolution of seismicity and deformation.

Equipe organisatrice : Ondes et structures

Salle Dolomieu, 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

Lire la suite

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

Lire la suite

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

Lire la suite

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

Lire la suite

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

Lire la suite

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

Lire la suite

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

Lire la suite

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

Lire la suite

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

Lire la suite