Several studies have highlighted that infrasound is a powerful tool for volcano monitoring and holds promise to improve our understanding of volcano unrest and eruptive processes. As such, infrasound sensors are routinely deployed at active volcanoes, typically co­located with seismometer networks. Recent studies have demonstrated the value of deploying infrasound sensors in array configuration (clusters of few sensors at interstation of up a few tens of meters) at distances up to a few kilometers from active volcanic vents. Arrays provide a powerful tool for real­time detection and tracking the time evolution of eruptive activity, and can deliver real­ time estimates of eruption intensity. Here, we report the results of extensive testing of a 6­element infrasound array at Mt. Etna,...