Remarks
The French National of Seismic Survey (Réseau national de surveillance sismique -Rénass) was created in order to improve mainland France's instrumental coverage in the early 1980s, with the installation of around 75 short-period stations. Since the 2010s, the French monitoring network has been modernised and extended thanks to the Broadband Construction project conducted within a national research infrastructure of observation (Résif).
The French Central Seismological Office (Bureau central sismologique français - BCSF) is responsible for collecting, analysing, disseminating and promoting information on French seismicity. It intervenes rapidly for any earthquake in France (in mainland France when the magnitude exceeds 3.7 and outside mainland France when it is widely felt). It pilots the collection of macroseismic data in the field and directly ensures their interpretation in terms of intensities. These surveys are carried out on a communal or individual scale via the 24-hour operational website. They consist of translating the damage caused and the perception of the event into "concrete" or qualitative terms in order to establish a felt intensity (EMS 98 scale from I to XII). The BCSF is responsible for the scientific report used by the French Ministry of the Interior to determine the state of natural disaster following an earthquake.
The Rénass and the BCSF have merged since 2016 and became BCSF-Rénass.