ISTerre - Institut des Sciences de la Terre

Projet UNDERVOLC : Compréhension des processus volcaniques

Florent BRENGUIER — 2025-09-05T13:50:51Z

Compréhension des processus volcaniques : vers la prédiction des éruptions et la prévention des risques volcaniques, application au Piton de la Fournaise / Réunion

Durée : 2009 - 2014

Coordinateur : Florent Brenguier (ISTerre)

Équipe ISTerre impliquée :
– Ondes et structures
– Géophysique des Volcans

Collaboration extérieures :
– IPGP- CNRS UMR7154
– BRGM

Résumé en anglais :

UnderVolc is a joint project between IPGP (Paris and OVPF), LGIT, BRGM and Parc National de la Réunion. Our goal is to improve our understanding of volcanic processes such as mechanism of volcanic unrest, dike propagation, temporal evolution of eruptions, rock falls linked to volcanic activity.

Our goal is also to improve the forecasting of volcanic eruptions and volcanic hazard mitigation. We will focus on the active (1 eruption per year on average) Piton de la Fournaise volcano on La Réunion island. During this 3 year project, we will deploy a broadband seismological network as well as a GPS network, both complementary to the permanent network ran by the Piton de la Fournaise Volcanological Observatory (OVPF).

Source

– En savoir plus

Projet NAMAZU : Mesures de variations de vitesses sismiques et de déformations associées au séisme de Tohoku

Florent BRENGUIER — 2025-09-05T13:50:28Z

Mesures de variations de vitesses sismiques et de déformations associées au séisme de Tohoku

Durée : 2011 - 2013

Coordinateur : Florent BRENGUIER (ISTerre)

Equipe ISterre impliquée :
– Ondes et structures

Collaborations :
– ERI Earthquake research institute, tokyo univ. japon
– NIED Earthquake research institute, tokyo univ. japon
– IPGP Institut de physique du globe de paris
– Tohoku Univ. Solid earth physics lab., tohoku univ - japon

Le séisme de Tohoku du 11 Mars 2011 est le méga-séisme (M>9) le mieux mesuré au monde grâce notamment aux réseaux géophysiques et géodésiques denses du Japon. Notre projet propose de mettre en application les nouvelles méthodes d'imagerie temporelle des propriétés sismiques de la croûte terrestre à partir du bruit de fond sismique pour l'étude du séisme de Tohoku et de ses implications tectoniques.

– [ En savoir plus : http://www.agence-nationale-recherche.fr/projet-anr/?tx_lwmsuivibilan_pi2[CODE]=ANR-11-JAPN-0006

Geophysical Data Centre

Anaïs SCHNEIDER, Florent BRENGUIER — 2013-10-09T15:09:20Z

The mission of theRESIF data centre is to distribute and archive all data from the French permanent and mobile seismological networks.

ISTerre'sGEODATA was in charge of prototyping RESIF's national data centre (from 2011 to 2016). The data centre, which went into operation at the end of 2016, is currently being co-operated by the University of Grenoble Alpes, the OSUG data centre and the ISterre laboratory.

The GEODATA service is also in charge of data collection and validation platforms for the INSU mobile fleet :SISMOB and for the French accelerometer network : RAP.

RESIF data are freely accessible : http://seismology.resif.fr

RESIF data center contacts

– generic addresses for the data center : resif-dc univ-grenoble-alpes.fr, dc resif.fr

– Helle Pedersen : scientific manager of the RESIF data centre
– Emeline Maufroy : scientific carrier of the platform for data collection and validation of the RESIF accelerometric antenna (RAP)
– Florent Brenguier : scientific carrier of the RESIF mobile antenna data collection and validation platform (SISMOB)
– Gregory Arneodo : CNRS research engineer
– Catherine Péquegnat : CNRS research engineer
– Jonathan Schaeffer : CNRS research engineer
– David Wolyniec : design engineer CNRS
– Jérôme Touvier : CNRS research engineer
– Rima Bouazzouz : design engineer CNRS

The business expertise of technical staff of the data center are :
– project management, information system architecture ;
– relational databases ;
– seismological databases, data/metadata matching, domain standards (processing, distribution tools, data and metadata formats), access to online databases and the use of international archives ;
– the deployment/development of applications related to the management and distribution of geophysical data.

Specific skills

– Python2.7, C, SQL, scripting tools and language
– Librairies Opspy, libmseed
– seismological data manipulation tools
– access to data via global servers
– seismological data and metadata format

The data collection, processing and distribution activities carried out by the service are upstream of the data mining and intensive exploitation activities. We implement massive and fast data access interfaces related to these activities.

Data center engineers work closely with instrument engineers from the laboratory's national observation services and facilities.

Calcul scientifique - Modélisation / imagerie

Florent BRENGUIER — 2013-10-09T15:08:33Z

Page à compléter

- Moyens et outils

Scientific calculation - Modelling / imaging

Anaïs SCHNEIDER, Florent BRENGUIER — 2013-10-09T15:08:33Z

Page to be completed

- Means and tools

Calcul scientifique - fouille de données

Florent BRENGUIER — 2013-10-09T15:07:00Z

L'informatique dédiée à l'exploitation intensive de gros volumes de données est principalement liée aux activités de recherches de l'équipe Ondes, activités liées aux méthodes basées sur le bruit ambiant. Cette expertise se situe à l'interface entre les géophysiciens, les spécialistes de HPC et les bases de données dans le cadre de projets nationaux et européens.

Les codes et documentations associées développés dans le cadre de l'activité 'Fouille de données' sont accessibles dans la Forge OSUG (accès restreint)

– Outils beamforming :documentation et code
– Outils conversion / prétraitement / corrélation : documentation et code

Les expertises métier des personnels techniques impliqués sont :

– Optimisation de codes séquentiels (méthodes numériques, choix des langages, ...)
– Parallélisation d'applications (MPI, OpenMP, make)
– Déploiement d'application
– Calcul sur grille (CiGri v3)
– iRODS : techniques de transfert, gestion des métadata, ...
– IO parallèles
– Traitement du signal : gestion des trous, décimation de données, ...

Contacts pour l'activitié 'Fouille de données'

– Michel Campillo, Philippe Roux, Florent Brenguier : chercheurs, responsable du projet ERC WHISPER, responsable équipe Ondes
– Albanne Lecointre, IR CNRS Informatique, équipe Ondes

Compétences spécifiques

– Python2.7, Fortran95, C
– Octave, Matlab
– Interfaçage Python/Fortran
– Opspy, NumPy
– scan de données : msi
– conversion de format : sac2mseed, win2sac_32
– exploitation de métadonnées : rdseed
– Bibliothèques de calcul scientifique BLAS Lapack, Scipy
– Format de fichiers SEED, NetCDF3
– MPI, OpenMP, make....
– Type de données : sismologiques

Les moyens matériels et logiciels adossés à l'activité 'Fouille de données'

– Lien vers les moyens de calcul CIMENT
– Lien vers les moyens de calcul ISTerre

Moyens logiciel : lien vers le serveur WHISPER ?

Liens avec les autres activités et moyens informatiques à ISterre et à l'OSUG

– Centre de données d'ISterre
– Moyens informatiques du laboratoire
– Centre de stockage OSUG

Lien vers les sites des projets de recherche auxquels participent les membres du groupe 'Fouille de données'

Les projets de recherche liés à l'activité sont

– Projet ERC WHISPER
– Projet européen VERCE
– ...

Scientific calculation - data mining

Anaïs SCHNEIDER, Florent BRENGUIER — 2013-10-09T15:07:00Z

The IT dedicated to the intensive exploitation of large volumes of data is mainly related to the research activities of the Ondes team, activities related to methods based on ambient noise. This expertise is at the interface between geophysicists, HPC specialists and databases in the context of national and European projects.

The codes and associated documentation developed as part of the activity "Data Mining" are accessible in the OSUG Forge (restricted access).

– Beamforming tools :documentation and code
– Conversion / preprocessing / correlation tools : documentation and code

The business expertise of the technical staff involved are :

– Optimization of sequential codes (numerical methods, choice of languages,...)
– Parallelization of applications (MPI, OpenMP, make)
– Application deployment
– Calculation on grid (CiGri v3)
– iRODS : transfer techniques, metadata management,...
– IO parallel
– Signal processing : hole management, data decimation,...

Contacts for the activity "Data mining

– Michel Campillo, Philippe Roux, Florent Brenguier : researchers, head of the ERC WHISPER project, team leader Ondes
– Albanne Lecointre, IR CNRS Informatique, team Ondes

Specific skills

– Python2.7, Fortran95, C
– Octave, Matlab
– Interfacing Python/Fortran
– Opspy, NumPy
– data scanning : msi
– format conversion : sac2mseed, win2sac_32
– metadata mining : rdseed
– Scientific computation libraries BLAS Lapack, Scipy
– File format SEED, NetCDF3
– MPI, OpenMP, make....
– Data type : seismological

Hardware and software resources backed by the activity'Data mining'.

– Link to the CEMENT calculation means
– Link to ISTerre calculation methods

Software resources : link to the WHISPER server ?

Links with other IT activities and resources in ISterre and OSUG

– ISTerre Data Centre
– Laboratory IT resources
– OSUG Storage Center

Link to the websites of the research projects in which members of the "Data Mining" group are involved

The research projects related to the activity are

– Project ERC WHISPER
– European project VERCE
– ...

NAMAZU project : Measurements of seismic velocity variations and deformations associated with the Tohoku earthquake

Anaïs SCHNEIDER, Florent BRENGUIER — 2011-02-25T08:18:00Z

Measurements of seismic velocity variations and deformations associated with the Tohoku earthquake
Duration : 2011 - 2013
Coordinator : Florent BRENGUIER (ISTerre)
ISTerre team involved : Waves and structures
Collaborations :
ERI Earthquake research institute, tokyo univ. japon
NIED Earthquake research institute, tokyo univ. japon
IPGP Institut de physique du globe de paris
Tohoku Univ. Solid earth physics lab., tohoku univ - japon

The Tohoku earthquake of March 11, 2011 is the best measured mega-seism (M>9) in the world, thanks in particular to Japan's dense geophysical and geodetic networks. Our project proposes to apply new methods of temporal imaging of seismic properties of the Earth's crust from seismic background noise to the study of the Tohoku earthquake and its tectonic implications.

– [ To know more : http://www.agence-nationale-recherche.fr/projet-anr/?tx_lwmsuivibilan_pi2[CODE]=ANR-11-JAPN-0006

UNDERVOLC project : Understanding volcanic processes

Anaïs SCHNEIDER, Florent BRENGUIER — 2009-11-21T09:15:00Z

Understanding volcanic processes : Towards Eruption Prediction and Risk Mitigation, an application to Piton de la Fournaise, la Reunion.
Duration : 2009 - 2014
Contact at ISTerre : Florent Brenguier
ISTerre research team involved : Waves and structures
External collaborations :
- IPGP- CNRS UMR7154
- BRGM

Summary
UnderVolc is a joint project between IPGP (Paris and OVPF), LGIT, BRGM and Parc National de la Réunion. Our goal is to improve our understanding of volcanic processes such as mechanism of volcanic unrest, dike propagation, temporal evolution of eruptions, rock falls linked to volcanic activity.

Our goal is also to improve the forecasting of volcanic eruptions and volcanic hazard mitigation. We will focus on the active (1 eruption per year on average) Piton de la Fournaise volcano on La Réunion island. During this 3 year project, we will deploy a broadband seismological network as well as a GPS network, both complementary to the permanent network ran by the Piton de la Fournaise Volcanological Observatory (OVPF).

Source

– See more