All three observatories consist of ~10 permanents staff members, an electronic lab, a mechanical workshop, an IT space, a situation room dedicated to monitoring the volcano’s activity and to crisis management. Additionally, the observatory of Guadeloupe has a geochemistry lab with a quadrupole spectrometer, amongst others, to analyse the fumarole gas and thermal springs. All observatories maintain a network of over 100 permanent stations in the field (seismometers, GNSS receivers, extensometers, tiltmeters, fumerole gas sampling, MultiGAS stations, DOAS spectrometers, stations measuring CO2 in the soil.