Improvement of broadband seismic station installations at the Observatoire de Grenoble (OSUG) seismic network

摘要

We describe in this paper different improvements that were brought to theinstallation of seismic broadband stations deployed by the Observatoire deGrenoble (OSUG) in the northern French Alps. This work was realized in theframe of a French-Italian ALCOTRA project (RISE), aimed at modernizing thebroadband seismic networks across our common border. We had the opportunitywith this project to improve some of our seismic recording sites, both interm of sensor installation quality, and in term of reliability. We detail inparticular the thermal and barometric protection system that we designed andshow its effect on the reduction of long period noise above 20 s.