Infrasound detections and calibration experiments

The development of infrasound research experienced a significant revival about 10 years ago thanks to the first steps made at that time for the establishment of the International Monitoring System infrasound network in the framework of the Comprehensive Test-Ban Treaty activities. The IMS infrasound network, which, as of today, counts 42 operational stations (i.e. the 70% of the network) has provided the infrasound community with an amount of information about natural and man-made sources without precedent. In parallel, several research groups around the world have developed projects to establish local infrasound networks which have been instrumental for the observation of events recorded at local and regional distances and have complemented, several times, the information retrieved through the IMS infrasound network. The infrasound research groups in Europe have been particularly active in the last years and, acting in close collaboration with CTBTO, have significantly contributed to the progress in understanding the generation and propagation of infrasound waves through the atmosphere, using both permanent and portable infrasound arrays.