On simulation of the atmospheric acoustic channel for some nuclear tests in former soviet test site Semipalatinsk

This paper presents data on the recording of infrasound from distant nuclear explosions set off in former soviet test site Semipalatinsk and recorded by infrasonic station Irkutsk–Badary of the Institute of Solar–Terrestrial Physics SB RAS in the Tunkinsky region in the Buryat Republic. We assess the state of the atmospheric acoustic channel (AAC) along the propagation path. Results of the AAC modeling are compared with experimental data.

► At the infrasonic station, we recorded a series of infrasonic signals from underground explosions carried out at Semipalatinsk test site at about 2000 km.
► Long-distance propagation of infrasound from underground nuclear explosions over long distances occurs in atmospheric acoustic channels (AAC) and is rarely seen.
► The AAC effectiveness depends on the distribution of wind and velocity of sound in the infrasound propagation region.
► The model of atmospheric acoustic channel for propagation of infrasonic waves from a nuclear explosion gives an insight into conditions of propagation of these signals over long distances from the source.