On results of observations on the Apatity infrasound complex

The analysis of events recorded by the Apatity infrasound array has been carried out. The events have been found by an automatic detection program. It has been shown that the detection of events in the frequency band 0.02-0.5 Hz is impossible due to huge wind noise for our configuration of fan pipe filters. The events detected in different frequency bands are of different nature. Mostly natural events (microbaromes) can be detected in 0.5-2 Hz band. Mostly human-made events are detected in 1-5 Hz band including signals of mining explosions at large distances (up to 1700 km). Near events including planes passing in the vicinity (Doppler effects) can be detected in 5-20 Hz frequency band.