Registration of avalanches in the Khibiny Mountains by the geophysical methods

In the winter months of 2018-2020 Kola Branch Unified Geophysical Service RAS conducted experiments on joint registration avalanches in Khibiny mountain range using seismic and infrasonic sensors during work forced descent snow mass. The aim is to assess possibility avalanche detection geophysical methods. lack representative statistics frequency regularity reason for relevance developing methods their remote registration. difficulty registering due occurrence often hard-to-reach areas poor visibility conditions. To record signals generated by avalanches, different configurations infrasound panels consisting three spatially separated (MPA 201 or Hyperion IFS-4000 microbarographs) a portable station Guralp CMG-6TD were used. As result experiments, recordings obtained at distances from source. group collected processed an automatic detector implementing amplitude cross-correlation signal spectral composition characteristic appearance analyzed. Avalanche-induced are characterized long duration changes azimuth dominant frequencies lie region 1-10 Hz. Conclusions made about insufficient sensitivity method when seismometer located distance first kilometers source, as well high applicability recording facts avalanches. results will make it possible develop methodology data This necessary basis building system continuous monitoring activity.