## 5 Conclusions  
Radon-tectonic signals were used to evaluate seismic phenomena through decomposition using the Fourier wavelet transform, data correlation via the Savitzky-Golay (SGolay) method, and time-based data categorization. The results show that the decomposition of a time series allows the identification of the percentage of data describing interactions between radon concentration values and the effects of the tectonic activity of the rock mass measured using water-tube tiltmeters. In accordance with the research assumption, for the correlation coefficient above 0.4, this percentage is on average only approx. 45% of the data recorded before, and approx. 44% of the data recorded after the seismic event. The interactions between the time series data from the radon probes and water-tube tiltmeters were demonstrated to occur continuously over each of the 168 h of the observations performed prior to the seismic event. These interactions may not be detectable within the first 48 h after a seismic event. The interaction between the probe and channel system varies with time.  
We observed that over the entire analyzed period, interactions between the recorded signals could be identified with the rock mass tension (positive correlations) and compression (negative correlations) phases. Mixed correlations (positive and negative) indicate that both the stress and strain phases of the rock mass were recorded. Positive and systematic correlations were observed for signals from channels 1, 2, and 3 between 25 and 48 h prior to the seismic event. The correlations with the signals from channels 3 and 4 were solely negative between 73 and 120 h prior to the seismic event. After the seismic event, such a systematic character was observed only in the case of positive correlations for channels 2, 3, and 4 between 25 and 96 h.  
The results indicate that at the research site, the radon-tectonic signal was best identified between 25 and 48 and between 49 and 72 h before the seismic shock. Each seismic shock had a different distribution of rock mass phases recorded by the integrated (probe-tiltmeter) measurement system. The phases were most evident before and after events no. 2 and 3.  
Particularly promising are the results showing the correlation between the tectonic signal recorded by a system of four perpendicular water-tube tiltmeters and the adjacent probes measuring the concentration of \({}^{222}\)Rn activity. The combined registration system of the tectonic and radon signals from nine detectors allowed a coherent representation of the rock mass behavior, in particular for the periods of 2-3 days and 1-2 days prior to the seismic event. Positive correlations between the tectonic and radon signals associated with the tension phase in the rock mass and negative correlations between the tectonic and radon signals associated with the compression phase allow for the description of the behavior of the rock mass before the seismic shock. The observed covariations (correlations) seem particularly promising, as they can be recorded already 1-3 days before the seismic event, allowing an appropriately early response to the expected seismic event. The observed correlation appears to be a valid indicator of the time of occurrence of a future earthquake.  
[PERSON] and [PERSON] are the originators and initiators of the research. [PERSON] is the initiator and the author of the first version of the manuscript. [PERSON] made graphs and figures and prepared correlation analyses and dataset for interpretation and discussion. [PERSON] wrote Section 3.1. [PERSON] wrote Sections 3.2 and 3.3. [PERSON] and [PERSON] helped in interpreting the obtained results. All authors have read and agreed to the published version of the manuscript.  
This paper has received funding from the Polish Ministry of Science and Higher Education: Subsidy 2025 for WUST.  
Not applicable.  
The raw data supporting the conclusions of this article will be made available by the authors on request.  
The authors declare no conflicts of interest.