Seismological station SisMob A194A installed within the framework of the Alparray project on the commune of Méolans (Alpes de Haute Provence)

This photo represents the installation of the seismological station A194A in Meolans (Alpes de Haute Provence) within the framework of the Alparray project (2015-2020), which aims at better understanding the dynamics of the Alps chain. These instruments are part of the national mobile seismological park (SisMob) of the research infrastructure Resif. In the foreground we can see the hole that has been dug to receive the seismological sensor. The sensor has been placed in the gray extension of which we can see the upper edge. This extension has been sealed in a concrete slab, and will then be closed by the cover placed on the ground, and covered with soil. In the background, we see a blue iron canteen that will protect the following equipment: the batteries that power the equipment, the digitizer that records the ground movements felt by the seismological sensor, and the modem that allows data transfer to the Resif data center. Resif is a national research infrastructure dedicated to the observation and understanding of the Earth's internal structure and dynamics. Resif is based on observation networks of high technological level, composed of seismological, geodetic and gravimetric instruments deployed densely throughout the French territory. The data collected allow to study with a high spatio-temporal resolution the ground deformation, the superficial and deep structures, the seismicity at the local and global scale and the natural hazards, especially seismic, on the French territory. Resif integrates with European (EPOS - European Plate Observing System) and worldwide instruments that allow to image the interior of the Earth as a whole and to study many natural phenomena.