Study of acoustic noise on Valaam Island
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A long-term endogenous nanomicroseismic event was registered instrumentally for the first time on Valaam Island (Lake Ladoga) in the winter of 2012. In the past, similar events in the form of acoustic emissions of separate phases have occurred from time to time and were heard by many residents and visitors to the island. This emission has long been known as barantida. The identification of the signal was based on a comprehensive analysis of the obtained seismograms and the subjective descriptions of this rare phenomenon by witnesses. It is proposed to continue instrumental observations in the mode of continuous high resolution seismoacoustic monitoring.
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