• shareshare
  • link
  • cite
  • add
auto_awesome_motion View all 4 versions
Other research product . Other ORP type . 2019

Presentation of the French seismological and geodetic network (Résif): An innovative research infrastructure for the study of the Earth’s interior

Walpersdorf, Andrea; Bertrand, Véronique; Sailler, Sylvain;
Published: 01 Jan 2019
Publisher: HAL CCSD
Country: France
The construction of Résif - the French seismological and geodetic network - was launched in 2009 in an effort to develop, modernize, and centralize geophysical observation of the Earth’s interior. This national research infrastructure is largely integrated into the European EPOS infrastructure and is actively involved in the continuing implementation and development of EPOS. Moreover, parts of Résif-Epos participate in centralized international networks and federations.Résif-Epos uses both permanent and mobile instrument networks for continuous seismological, geodetic and gravimetric measurements. The collected data reveal both the structure and dynamics of our planet. These data also contribute to the sustainable management of natural resources and to natural geohazard mitigation. In seismology, Résif-Epos is developing a permanent and dense network of nearly 200 broadband seismic sensors throughout continental France. It is complemented by a permanent network of accelerometers used to study strong and localized movements of the Earth in the most seismically active areas in France and abroad.These networks allow researchers to better understand and image the Earth's interior, from the crust to the Earth's core. As basic tools for real-time monitoring of seismic activity, these networks also help to estimate seismic hazard, including the probability that a shaking will exceed a certain threshold at a given location and over a given time period.Résif-Epos also includes a permanent network of geodetic stations. These stations are used to measure ground displacement rates of a few tenths of millimetres per year and monitor crustal deformation and the processes that create landforms and generate seismicity, particularly in fault zones.Résif-Epos also uses gravimeters that measure slight variations in the Earth’s gravitational field to study the mass distribution and dynamics inside the Earth.In addition to these permanent networks, Résif-Epos coordinates the deployment of various pools of mobile instruments to temporarily increase measurement density in France or in areas of high scientific interest in Europe and elsewhere on the globe. Open to the entire academic scientific community, these temporary networks offer a large range of state of the art technologies and some truly exceptional pieces of equipment, such as the Absolute Quantum Gravimeter. An efficient information system manages the ten terabytes of data collected annually. Raw data are analyzed, validated and then centralized for archiving and free distribution in real time, in accordance with open science policy. Every year, tens of millions of data requests are submitted to Résif by scientists from around the world.The CNRS National Institute for Earth Sciences and Astronomy coordinates the Résif-Epos consortium which is composed of a majority of French universities and organizations involved in geoscience research. More than a hundred researchers, engineers and technicians work together on a daily basis to make Résif-Epos a tremendous scientific tool available to the global Earth Sciences community.

Seismological network, GNSS, Instrumentation, Gravimetry, Geodesy, Seismology, RESIF, GNSS network, Gravimetric network, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]