Network XP_2023

• Scientific goal : imaging of the crust and upper mantle (to a depth of 600-700 km) beneath the Massif Central, with deca-km resolution.

• 35 broadband stations (blue stars on the map) covering the whole of the Massif Central, to fill in the areas not (or poorly) covered by the permanent FR, G & RD networks (green circles on the map).

• Homogeneous coverage of the entire Massif, with a distance between stations of around 35 km.

• Instruments : T120QA and STS-2 broadband velocimeters, with Centaur acquisition systems belonging to the national Sismob pool of the Epos-France research infrastructure.

• Real-time data transmission to the Epos-Fr seismological data centre hosted by the OSUG via GSM modems.

• Remote supervision of network operation using the SyNApSE tool.

• Experiment duration : at least 3 years. Stations installed between 28/02/2023 (FR04A) and 24/01/2024 (FR11A). Dismantling scheduled in the first half of 2027.

• Estimated data size : 2.9 TB.
• Public data, distributed by the EPOS-France seismological data centre.

• This network is the French contribution to the European initiative AdriaArray.