## 4 Results and Discussion
### Interactions After the Seismic Event
Between 145 and 168 h before and after the event, only positive correlations were observed between the signals on channel 4 and probe 4. The signal on channel 2 was positively correlated with the signals from all probes. The study also presented the correlation patterns at both ends of the pipes comprising the seismic activity measurement system. Between 25 and 48 h prior to the event, the signal on channel 1 was positively correlated with the signals from probes 3, 4, 5, and 6. At this time, the signal on channel 2 (the second end of the system) was negatively correlated with the signals from probes 5 and 2. Between 49 and 72 h prior to the event, the signal from channel 1 was positively correlated with the signals from probes 4, 5, and 6. The signal on channel 2 was inversely proportional to the signals from Probes 2 and 6. The relationships were also different on both ends of the 3-4 channel system. The signal on channel 3 positively correlated with the signals from probes 3 and 5, and the signal on channel 4 negatively correlated with the signals from probes 2 and 4. Both positive and negative correlations were observed on both ends of the 1-2 system between 25 and 48 h, 73 and 96 h, 97 and 120 h, and between 145 and 168 h after the seismic event. In the first case, the signal on channel 2 was positively correlated with the signals from probes 2 and 4, and the signal on channel 1 was negatively correlated with the signals from probes 3 and 6. In the second case, the signal on channel 2 was positively correlated with the signals from probes 3 and 6, and the signal on channel 1 was negatively correlated with the signals from probes 2, 3, 5, and 6. In the third case, the signal on channel 2 was positively correlated with the signal from probe 6, and the signal on channel 1 was negatively correlated with the signals from probes 3 and 6. In the last case, the signal on channel 2 was positively correlated with the signals from probes 2, 4, 5, and 6, and the signal on channel 1 was negatively correlated with the signals from probes 3 and 4 (Table 4). Each of the analyzed seismic events had different shock characteristics, which were measured using the probe-tiltmeter system both before and after the event. Before and after event no. 3, over the first 24 h, the positive correlations assigned to the tension phase of the rock mass were indicated by the signals from probe 6 and channels 3 and 4. The \begin{table}
\begin{tabular}{c c c c} \hline
**Range of Time Observations [h]** & **Channel No.** & **Correlation Course** & **SRDN-3 No.** \\ \hline \multicolumn{4}{c}{**Before seismic activity**} \\ \hline
1–24 & - & - & - \\
25–48 & 1 & + & 3, 4, 5, 6 \\  & 2 & - & 5, 2 \\  & 1 & + & 4, 5, 6 \\  & 2 & - & 2, 6 \\
49–72 & 3 & + & 3, 5 \\  & 4 & - & 2, 4 \\
73–96 & - & - & - \\
97–120 & - & - & - \\
121–144 & - & - & - \\
145–168 & - & - & - \\ \hline \multicolumn{4}{c}{**After seismic activity**} \\ \hline
1–24 & - & - & - \\
25–48 & 2 & + & 2, 4 \\
49–72 & - & - & - \\  & 2 & + & 3, 6 \\
73–96 & 1 & - & 2, 3, 5, 6 \\
97–120 & 2 & + & 6 \\
121–144 & - & - & - \\
145–168 & 2 & + & 2, 4, 5, 6 \\ \hline \end{tabular}
\end{table} 
Table 4: Interactions for the two ends of the probe-tiltmeter system over subsequent 24-h interval blocks of observations performed before and after the seismic event. same measurement set indicates a positive correlation before and a negative correlation after event no. 2. In the time range between 25 and 48 h, the signal on channel 2 and the signals from probes 3 and 6 were negatively correlated before and positively correlated after events no. 2 and 3. An identical relationship was observed before and after events no. 2 and 3 between the signals from channel 4 and probe 4. A similar activity level was also observed before and after events 2 and 3 between the signals from channel 2 and probes 3 and 5. This correlation was negative before and positive after the event. Before and after events no. 2 and 4, the signal from probe 2 was positively correlated with the signal from channel 2.