The installation, operation and maintenance of instruments are carried out by the personnel of the observatories of the sciences of the Universe involved in Résif through specific actions
Instrument networks which respond to scientific challenges
The scientific challenges posed by the exploitation of resources and the development of sustainable and competitive human activities require high-performance instruments to measure and observe the Earth, its movements, its wealth of resources and its natural hazards.
Résif thus combines a very high density of measurement and a very high temporal resolution. This paves the way for new perspectives on the observation and knowledge of how the Earth functions, notably through studies of:
- ground deformation over periods of time ranging from microseconds to ten years;
- seismicity at both global and local scales;
- the Earth’s surface and deep structures.
All of these studies will enable scientists to more accurately estimate natural, and particularly seismic hazards on French territory.
Three families of instruments
Résif is thus made up of 3 families of instruments spread throughout mainland France and managed by specific action projects. (Please note that targeted actions concerning French overseas territories are carried out within the framework of the permanent accelerometric network Résif-Rap).
Each of these three families is divided into a permanent and a mobile component. The “mobile” instruments are made available to researchers from the Earth Sciences community if no permanent observatories are available or as a complement to permanent observatories which enable researchers to densify spatial sampling. They are used for experiments of a limited duration (from a few days to a few years) aimed at collecting seismological, geodetic and gravimetric data.
Some figures: (August 2019)
- Permanent instrumentation: 842 Résif stations and 407 associated stations.
- Mobile instrumentation: 277 stations deployed on 4957 sites since the launch of Résif.
Specific actions in seismology
- Permanent accelerometer network – Rap
- Permanent broadband network – RLBP
- National mobile seismic park – SisMob
Specific actions in GNSS
Specific actions in gravimetry
These photos are from the Hal-Résif collection and are distributed under CC-BY 4.0 license. To enlarge the pictures and view the captions, click on a photo © Résif – To know more about it