Relationship of Low-Frequency Variations of Meteorological Parameters Measured at a Network of Stations in Japan to Seismic Regime

The relationship between humidity, pressure, temperature and wind speed measured at a network of stations on the Japanese islands and the seismic regime is studied for time 1973-2025. For each of the parameters, weighted average time series were constructed using the principal component method. Time series of weighted average parameters were subjected to wavelet decomposition. For wavelet decomposition levels the amplitudes of the envelopes and the points of their local extrema were found, which were compared with the times of earthquakes. The problem of estimating the advance measure of envelope extremum points relative to earthquake time moments was considered using a model of interacting point processes. For a sequence of 213 strong earthquakes with a magnitude of at least 6.5, the same number of the largest local maxima and the smallest local minima were selected for the extrema of envelopes amplitude of each parameter. It turned out that the largest advance measures occur for the 7th level of decomposition (periods from 16 to 32 days). Two advance mechanisms were identified: one mechanism is associated with the trigger effect of cyclones on seismicity, and the second with the occurrence of atmospheric earthquake precursors.