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Recording of a volcanic earthquake in Hawaii on July 11, 2018 at the Résif-RLBP station MANO in Manonville (Meurthe-et-Moselle)

2018-07-11

Description : Recording of a volcanic earthquake in Hawaii on 11/07/2018 at 15:45 UTC (Mw = 5.3) at the Résif-RLBP station in Manonville in a configuration with a near-surface sensor installed for the AlpArray project (high-station Z3.A210A) and a sensor in the shallow borehole of the permanent station (middle - station FR.MANO). For comparison the bottom trace present at the recording at the Geoscope station in Echery (G.ECH station). The Permanent Broadband Network (RLBP) was officially accredited as a CNRS-Insu National Observation Service in 2007. It involves eight Observatories of the Universe Sciences (OSU) as well as the Analysis, Monitoring and Environment Department (DASE) of the CEA, and is coordinated by the School and Earth Sciences Observatory in Strasbourg. The need to develop the RLBP was partly at the origin of the establishment of the Résif Research Infrastructure (French Seismological and Geodetic Network), of which it is now a specific action. Comprising 17 stations at its creation, the RLBP's ambition is to build a network of around 190 stations covering the entire country by 2022, but with increased density in the most seismic areas. This density of stations will significantly improve our knowledge of the deep structure, as well as our estimate of seismic hazard in France, by reducing the magnitude of completeness to less than 2 throughout the territory. The objective is also to be able to use this network as a real seismological antenna for long periods of time, in particular through its integration into the European virtual network of the EPOS infrastructure. In addition, the RLBP aims to provide very high quality data. This involves choosing isolated sites to limit seismic noise generated by human activity and careful installation of seismometers to mitigate the influence of environmental parameters (temperature, pressure, wind). It is also about putting in place different tools and procedures to provide the most complete possible time series and correct and continuously updated metadata. The French Seismological and Geodetic Network Résif is a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the Internal Earth. Résif 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. Résif 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.


https://medihal.archives-ouvertes.fr/medihal-02144617
Contributor : Véronique Bertrand Connect in order to contact the contributor
Submitted on : Friday, May 31, 2019 - 9:52:15 AM
Last modification on : Tuesday, May 17, 2022 - 3:12:03 PM