11 research outputs found

    Ground deformation monitoring of the eruption offshore Mayotte

    Get PDF
    In May 2018, the Mayotte island, located in the Indian Ocean, was affected by an unprecedented seismic crisis, followed by anomalous on-land surface displacements in July 2018. Cumulatively from July 1, 2018 to December 31, 2021, the horizontal displacements were approximately 21 to 25 cm eastward, and subsidence was approximately 10 to 19 cm. The study of data recorded by the on-land GNSS network, and their modeling coupled with data from ocean bottom pressure gauges, allowed us to propose a magmatic origin of the seismic crisis with the deflation of a deep source east of Mayotte, that was confirmed in May 2019 by the discovery of a submarine eruption, 50 km offshore of Mayotte ([Feuillet et al., 2021]). Despite a non-optimal network geometry and receivers located far from the source, the GNSS data allowed following the deep dynamics of magma transfer, via the volume flow monitoring, throughout the eruption

    Installation du capteur vélocimétrique large-bande STS-2 dans la station de Fort de France (Martinique)

    No full text
    This image shows the installation of the Streckeisen STS-2 wideband velocity sensor in the Fort de France station in 2008. This station is part of GEOSCOPE, a global network of broadband seismological stations. The stations belonging to this network continuously record ground movements. Data from most stations arrive in real time at the IPGP data center and are archived after validation. The GEOSCOPE network provides the scientific community with data on earthquakes with a magnitude greater than 5.5-6 and provides specific information on these earthquakes. This observation site is part of the French seismological and geodetic network RĂ©sif, a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena.Cette image montre l'installation du capteur vĂ©locimĂ©trique large-bande Streckeisen STS-2 dans la station de Fort de France en 2008. Cette station fait partie de GEOSCOPE, un rĂ©seau mondial de stations sismologiques large bande. Les stations appartenant Ă  ce rĂ©seau enregistrent en continu les mouvements du sol. Les donnĂ©es de la plupart des stations arrivent en temps rĂ©el au centre de donnĂ©es de l'IPGP et sont archivĂ©es aprĂšs validation. Le rĂ©seau GEOSCOPE met Ă  disposition de la communautĂ© scientifique les donnĂ©es des sĂ©ismes de magnitude supĂ©rieure Ă  5.5-6 et fournit des informations spĂ©cifiques sur ces sĂ©ismes. Ce site d'observation est intĂ©grĂ© au RĂ©seau sismologique et gĂ©odĂ©sique français RĂ©sif, une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels

    EntrĂ©e de la station d'ÉchĂ©ry (ECH) situĂ©e dans une ancienne mine (Sainte-Marie-aux-Mines)

    No full text
    This image shows the entrance to the ÉchĂ©ry station, located in a former mine. Disused mine galleries are ideal locations for seismological stations. Indeed, the sensor is placed on a flat concrete surface poured directly onto the rock and temperature and pressure variations are low. This station is part of GEOSCOPE, a global network of broadband seismic stations. The stations belonging to this network continuously record ground movements. Data from most stations arrive in real time at the IPGP data center and are archived after validation. The GEOSCOPE network provides the scientific community with data on earthquakes with a magnitude greater than 5.5-6 and provides specific information on these earthquakes. The ÉchĂ©ry station depends on RESIF's initiative to increase the number of stations and homogenize their distribution in order to create a real permanent seismological antenna (RLBP) composed of 200 sites by 2020. This evolution constitutes the RESIF-CLB (Broadband Construction) project whose project management has been entrusted to the Technical Division of the INSU. This is one of the flagship actions of RESIF, a national research infrastructure dedicated to observing and understanding the structure and dynamics of the Internal Earth. RESIF is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RESIF is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena.Cette image montre l'entrĂ©e de la station d'ÉchĂ©ry, situĂ©e dans une ancienne mine. Les galeries de mines dĂ©saffectĂ©es sont des emplacements privilĂ©giĂ©s pour l'installation des stations sismologiques. En effet, le capteur y est posĂ© sur une surface plane en bĂ©ton coulĂ©e Ă  mĂȘme le rocher et les variations de tempĂ©rature et de pression y sont faibles. Cette station fait partie de GEOSCOPE, un rĂ©seau mondial de stations sismologiques large bande. Les stations appartenant Ă  ce rĂ©seau enregistrent en continu les mouvements du sol. Les donnĂ©es de la plupart des stations arrivent en temps rĂ©el au centre de donnĂ©es de l'IPGP et sont archivĂ©es aprĂšs validation. Le rĂ©seau GEOSCOPE met Ă  disposition de la communautĂ© scientifique les donnĂ©es des sĂ©ismes de magnitude supĂ©rieure Ă  5.5-6 et fournit des informations spĂ©cifiques sur ces sĂ©ismes. La station d'ÉchĂ©ry dĂ©pend de l'initiative de RESIF d’accroĂźtre le nombre de stations et d’homogĂ©nĂ©iser leur rĂ©partition pour aboutir Ă  la crĂ©ation d’une vĂ©ritable antenne sismologique permanente (RLBP) composĂ©e de 200 sites Ă  l’horizon 2020. Cette Ă©volution constitue le projet RESIF-CLB (Construction Large Bande) dont la maĂźtrise d’Ɠuvre a Ă©tĂ© confiĂ©e Ă  la Division Technique de l’INSU. Il s’agit de l’une des actions phares de RESIF, une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RESIF se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RESIF s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels

    Entrée de la station ECH située dans une ancienne mine à Sainte-Marie-aux-Mines (Haut-Rhin)

    No full text
    This image shows the entrance to the statio ECH, located in an old mine at Sainte-Marie-aux-Mines (Haut-Rhin). Disused mine galleries are ideal locations for seismological stations. Indeed, the sensor is placed on a flat concrete surface poured directly onto the rock and temperature and pressure variations are low. This station is part of GEOSCOPE, a global network of broadband seismic stations. The stations belonging to this network continuously record ground movements. Data from most stations arrive in real time at the IPGP data center and are archived after validation. The GEOSCOPE network provides the scientific community with data on earthquakes with a magnitude greater than 5.5-6 and provides specific information on these earthquakes. The ÉchĂ©ry station depends on RĂ©sif's initiative to increase the number of stations and homogenize their distribution in order to create a real permanent seismological antenna (RLBP) composed of 200 sites by 2020. This evolution constitutes the RĂ©sif-CLB (Broadband Construction) project whose project management has been entrusted to the Technical Division of the Insu. This is one of the flagship actions of RĂ©sif, a national research infrastructure dedicated to observing and understanding the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena.Cette image montre l'entrĂ©e de la station ECH, situĂ©e dans une ancienne mine Ă  Sainte-Marie-aux-Mines (Haut-Rhin). Les galeries de mines dĂ©saffectĂ©es sont des emplacements privilĂ©giĂ©s pour l'installation des stations sismologiques. En effet, le capteur y est posĂ© sur une surface plane en bĂ©ton coulĂ©e Ă  mĂȘme le rocher et les variations de tempĂ©rature et de pression y sont faibles. Cette station fait partie de GEOSCOPE, un rĂ©seau mondial de stations sismologiques large bande. Les stations appartenant Ă  ce rĂ©seau enregistrent en continu les mouvements du sol. Les donnĂ©es de la plupart des stations arrivent en temps rĂ©el au centre de donnĂ©es de l'IPGP et sont archivĂ©es aprĂšs validation. Le rĂ©seau GEOSCOPE met Ă  disposition de la communautĂ© scientifique les donnĂ©es des sĂ©ismes de magnitude supĂ©rieure Ă  5.5-6 et fournit des informations spĂ©cifiques sur ces sĂ©ismes. La station d'ÉchĂ©ry dĂ©pend de l'initiative de RĂ©sif d’accroĂźtre le nombre de stations et d’homogĂ©nĂ©iser leur rĂ©partition pour aboutir Ă  la crĂ©ation d’une vĂ©ritable antenne sismologique permanente (RLBP) composĂ©e de 200 sites Ă  l’horizon 2020. Cette Ă©volution constitue le projet RĂ©sif-CLB (Construction Large Bande) dont la maĂźtrise d’Ɠuvre a Ă©tĂ© confiĂ©e Ă  la Division Technique de l’Insu. Il s’agit de l’une des actions phares de RĂ©sif, une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels

    Sortie de l'antenne GPS de la station de Chambon-la-ForĂȘt (Loiret)

    No full text
    This image shows the GPS antenna of the Chambon-la-ForĂȘt station. This station is part of GEOSCOPE, a global network of broadband seismological stations. The stations belonging to this network continuously record ground movements. Data from most stations arrive in real time at the IPGP data center and are archived after validation. The GEOSCOPE network provides the scientific community with data on earthquakes with a magnitude greater than 5.5-6 and provides specific information on these earthquakes. The installation of the GPS antenna is the result of RĂ©sif's initiative to increase the number of stations and homogenize their distribution, leading to the creation of a real permanent seismological antenna (RLBP) composed of 200 sites by 2020. This evolution constitutes the RĂ©sif-CLB (Broadband Construction) project whose project management has been entrusted to the Technical Division of the Insu. This is one of the flagship actions of RĂ©sif, a national research infrastructure dedicated to observing and understanding the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena.Cette image montre l'antenne GPS de la station de Chambon-la-ForĂȘt. Cette station fait partie de GEOSCOPE, un rĂ©seau mondial de stations sismologiques large bande. Les stations appartenant Ă  ce rĂ©seau enregistrent en continu les mouvements du sol. Les donnĂ©es de la plupart des stations arrivent en temps rĂ©el au centre de donnĂ©es de l'IPGP et sont archivĂ©es aprĂšs validation. Le rĂ©seau GEOSCOPE met Ă  disposition de la communautĂ© scientifique les donnĂ©es des sĂ©ismes de magnitude supĂ©rieure Ă  5.5-6 et fournit des informations spĂ©cifiques sur ces sĂ©ismes. L'installation de l'antenne GPS rĂ©sulte de l'initiative de RĂ©sif d’accroĂźtre le nombre de stations et d’homogĂ©nĂ©iser leur rĂ©partition pour aboutir Ă  la crĂ©ation d’une vĂ©ritable antenne sismologique permanente (RLBP) composĂ©e de 200 sites Ă  l’horizon 2020. Cette Ă©volution constitue le projet RĂ©sif-CLB (Construction Large Bande) dont la maĂźtrise d’Ɠuvre a Ă©tĂ© confiĂ©e Ă  la Division Technique de l’Insu. Il s’agit de l’une des actions phares de RĂ©sif, une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels

    Installation du capteur vĂ©locimĂ©trique large-bande STS-2 dans la station de Chambon-la-ForĂȘt (Loiret)

    No full text
    This image shows the installation of the Streckeisen STS-2 wideband velocity sensor in the Chambon-la-ForĂȘt station in 2008. This station is part of GEOSCOPE, a global network of broadband seismological stations. The stations belonging to this network continuously record ground movements. Data from most stations arrive in real time at the IPGP data center and are archived after validation. The GEOSCOPE network provides the scientific community with data on earthquakes with a magnitude greater than 5.5-6 and provides specific information on these earthquakes. This sensor is also part of RĂ©sif's permanent broadband network (RLBP), a national research infrastructure dedicated to observing and understanding the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena.Cette image montre l'installation du capteur vĂ©locimĂ©trique large-bande Streckeisen STS-2 dans la station de Chambon-la-ForĂȘt en 2008. Cette station fait partie de GEOSCOPE, un rĂ©seau mondial de stations sismologiques large bande. Les stations appartenant Ă  ce rĂ©seau enregistrent en continu les mouvements du sol. Les donnĂ©es de la plupart des stations arrivent en temps rĂ©el au centre de donnĂ©es de l'IPGP et sont archivĂ©es aprĂšs validation. Le rĂ©seau GEOSCOPE met Ă  disposition de la communautĂ© scientifique les donnĂ©es des sĂ©ismes de magnitude supĂ©rieure Ă  5.5-6 et fournit des informations spĂ©cifiques sur ces sĂ©ismes. Ce capteur fait Ă©galement partie du rĂ©seau large bande permanent (RLBP) de RĂ©sif, une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels

    EntrĂ©e de la station d'ÉchĂ©ry (ECH) situĂ©e dans une ancienne mine (Sainte-Marie-aux-Mines)

    No full text
    This image shows the entrance to the ÉchĂ©ry station, located in a former mine. Disused mine galleries are ideal locations for seismological stations. Indeed, the sensor is placed on a flat concrete surface poured directly onto the rock and temperature and pressure variations are low. This station is part of GEOSCOPE, a global network of broadband seismic stations. The stations belonging to this network continuously record ground movements. Data from most stations arrive in real time at the IPGP data center and are archived after validation. The GEOSCOPE network provides the scientific community with data on earthquakes with a magnitude greater than 5.5-6 and provides specific information on these earthquakes. The ÉchĂ©ry station depends on RĂ©sif's initiative to increase the number of stations and homogenize their distribution in order to create a real permanent seismological antenna (RLBP) composed of 200 sites by 2020. This evolution constitutes the RĂ©sif-CLB (Broadband Construction) project whose project management has been entrusted to the Technical Division of the Insu. This is one of the flagship actions of RĂ©sif, a national research infrastructure dedicated to observing and understanding the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena.Cette image montre l'entrĂ©e de la station d'ÉchĂ©ry, situĂ©e dans une ancienne mine. Les galeries de mines dĂ©saffectĂ©es sont des emplacements privilĂ©giĂ©s pour l'installation des stations sismologiques. En effet, le capteur y est posĂ© sur une surface plane en bĂ©ton coulĂ©e Ă  mĂȘme le rocher et les variations de tempĂ©rature et de pression y sont faibles. Cette station fait partie de GEOSCOPE, un rĂ©seau mondial de stations sismologiques large bande. Les stations appartenant Ă  ce rĂ©seau enregistrent en continu les mouvements du sol. Les donnĂ©es de la plupart des stations arrivent en temps rĂ©el au centre de donnĂ©es de l'IPGP et sont archivĂ©es aprĂšs validation. Le rĂ©seau GEOSCOPE met Ă  disposition de la communautĂ© scientifique les donnĂ©es des sĂ©ismes de magnitude supĂ©rieure Ă  5.5-6 et fournit des informations spĂ©cifiques sur ces sĂ©ismes. La station d'ÉchĂ©ry dĂ©pend de l'initiative de RĂ©sif d’accroĂźtre le nombre de stations et d’homogĂ©nĂ©iser leur rĂ©partition pour aboutir Ă  la crĂ©ation d’une vĂ©ritable antenne sismologique permanente (RLBP) composĂ©e de 200 sites Ă  l’horizon 2020. Cette Ă©volution constitue le projet RĂ©sif-CLB (Construction Large Bande) dont la maĂźtrise d’Ɠuvre a Ă©tĂ© confiĂ©e Ă  la Division Technique de l’Insu. Il s’agit de l’une des actions phares de RĂ©sif, une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels

    Noeud A GEOSCOPE : bilan et perspectives

    Get PDF
    Knot A GEOSCOPE validates and transmits to knot B of the RĂ©sif information system the data from the GEOSCOPE broadband seismological station observatory, which represents: 35 years of data (1.8 TB): seismological (since 1982) and accelerometric (since 2012), temperature and pressure, and 31 real-time stations, over 400 operational channels sampled at 100Hz, 20Hz and 1Hz.This poster presents the results and prospects of this node at the end of 2017, as part of the RĂ©sif deployment. The French Seismological and Geodetic Network RĂ©sif is a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is integrated into European (EPOS - European Plate Observing System) and global systems of instruments for imaging the Earth's interior as a whole and studying many natural phenomena. The GEOSCOPE Observatory, created in 1982, consists of a network of 33 seismological stations in 18 countries, whose instrumentation and maintenance are carried out in collaboration between the IPGP and the Eost in Strasbourg. The IPGP data centre is responsible for data management and distribution. The data are also distributed by the national RĂ©sif data centre and by IRIS-DMC. The GEOSCOPE Observatory aims to provide broadband seismological data from its 33 stations to the French and international scientific community. GEOSCOPE is therefore an important component of the global seismological network, which allows analyses of the earth's structure, seismic noise, and earthquake process (see the quick information provided by GEOSCOPE on global earthquakes of magnitude greater than 5.5-6).Le NƓud A GEOSCOPE valide et transmet au nƓud B du systĂšme d'information RĂ©sif les données de l'observatoire de stations sismologiques large bande GEOSCOPE, ce qui reprĂ©sente : 35 ans de données (1,8 To) : sismologiques (depuis 1982) et accéléromĂ©triques (depuis 2012), température et pression, et 31 stations en temps réel, plus de 400 canaux opérationnels échantillonnés à 100Hz, 20Hz et 1Hz.Ce poster prĂ©sente le bilan et les perspectives de ce noeud A fin 2017, dans le cadre du dĂ©ploiement de RĂ©sif. Le RĂ©seau sismologique et gĂ©odĂ©sique français RĂ©sif est une infrastructure de recherche nationale dĂ©diĂ©e Ă  l’observation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux d’observation de haut niveau technologique, composĂ©s d’instruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent d’étudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă  l’échelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif s’intĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux d’instruments permettant d’imager l’intĂ©rieur de la Terre dans sa globalitĂ© et d’étudier de nombreux phĂ©nomĂšnes naturels. L'Observatoire GEOSCOPE, crĂ©Ă© en 1982, est constituĂ© d'un rĂ©seau de 33 stations sismologiques rĂ©parties dans 18 pays, dont l'instrumentation et la maintenance sont rĂ©alisĂ©es au sein d'une collaboration entre l'IPGP et l'Eost Ă  Strasbourg. Le centre de donnĂ©es de l'IPGP assure la gestion des donnĂ©es et leur distribution. Les donnĂ©es sont Ă©galement distribuĂ©es par le centre national de donnĂ©es RĂ©sif et par IRIS-DMC. L'Observatoire GEOSCOPE a pour but de fournir les donnĂ©es sismologiques large-bande de ses 33 stations Ă  la communautĂ© scientifique française et internationale. GEOSCOPE est donc une composante importante du rĂ©seau sismologique mondial, qui permet des analyses de la structure terrestre, du bruit sismique, et du processus des tremblements de Terre (voir les informations rapides fournies par GEOSCOPE sur les sĂ©ismes mondiaux de magnitude supĂ©rieure Ă  5.5-6)
    corecore