ИСТИНА

Ambient noise of the Earth means the constant variations of the parameters of seismic noise and tremor of the earth's surface, measured by means of space geodesy. The source of these random fluctuations are the impacts on the Earth's crust from the atmosphere and the ocean, as well as internal processes in the earth's envelopes, including anticipating major geological disasters. Currently, the number of active GPS stations that record earth surface displacements in three directions with a time step of 5 minutes exceeds 11 thousand and is constantly growing. The number of broadband seismic stations in the global network amounts to hundreds. We present the results of the analysis of global and regional seismic noise using a number of nonlinear statistics estimated in moving time windows. The set of statistics used to study the properties of seismic noise and trembling of the earth’s surface includes the multi-fractal and entropy properties of signals. The rhythms of changes in coherence and trends of seismic noise parameters with a period of about 2.5 years, presumably initiated by a sharp violation of the Earth’s rotation regularity in 2003, are highlighted. The work was supported by Russian Foundation for Basic Research (project no. 18-05-00133).