## 2 Data Description
### Seismological Data  
We used waveform data from three regional component stations of the Hellenic Unified Seismological Network (HUSN); detailed information is presented in Table 1 and Figure 2. The National Observatory of Athens operates this network, composed of the Institute of Geodynamics and the Seismological Laboratories of three Universities, such as the University of Thessaloniki (A.U.Th. Seismological Network). In the present study, seismological research was divided into two categories. The first involved the localization of significant events, i.e., epicenter (i.e., latitude and longitude), depth (d), and local magnitude (M\({}_{\rm L}\)) using SeisComP4 [30]; available at: <[[https://www.seiscomp.de/download/](https://www.seiscomp.de/download/)]([https://www.seiscomp.de/download/](https://www.seiscomp.de/download/))> (accessed on 8 June 2022); and, more specifically, Scolv [31]. Scolv was the primary interactive tool for revising or reviewing origin information such as picks, location, depth, time, magnitudes, and event association. Scolv can be operated in two modes. The first is connected to messaging, where all event and station inventory parameters are received from the messaging or the database and updated in real-time. Finally, new or updated parameters can be committed to the messaging. The second used in this study was offline without messaging, where all event and station inventory parameters are read from XML files or the database and updated interactively. For the best calculation of the epicenter and the minimization of the errors in the depth and epicenter analysis, a necessary condition is selecting an appropriate velocity model. The present research used the 1D velocity model proposed by [PERSON] [32]. The next task of this paper was the calculation of the source parameters (i.e., strike, dip, rake, depth, and moment magnitude) for the strong events and all significant aftershocks. Knowledge of the seismic moment tensor effectively contributes to determining seismic parameters. For example, in the late 1960s, the calculation of the seismic moment tensor [33] began from several methodologies developed both in the field of time [34; 35; 36; 37; 38] and in the field \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Stations** & **Latitude (\({}^{\circ}\))** & **Longitude (\({}^{\circ}\))** & **Code** & **Elevation (m)** & **Datalogger** & **Seismometer** \\ \hline THL & 39.5646 & 22.0144 & HL/MN & 86 & DR24-SC & STS-2 \\ KZN & 40.3033 & 21.7820 & HL & 791 & DR24-SC & STS-2 \\ NEO & 39.3056 & 23.2218 & HL & 510 & DR24-SC & KS2000M \\ JAN & 39.6561 & 20.8487 & HL & 526 & DR24-SC & CMG-3 ESPC/60 \\ EVR & 38.9165 & 21.8105 & HL & 1037 & DR24-SC & CMG-3 ESPC/60 \\ LIT & 40.1003 & 22.4893 & HT & 568 & Trident-B & CMG-3 ESP/100 \\ NEO & 39.3056 & 23.2218 & HL & 510 & DR24-SC & KS2000M \\ XOR & 39.3660 & 23.1920 & HT & 500 & TAURUS & CMG-3 ESP/100 \\ YTRN & 39.7110 & 22.2325 & HT & 151 & TAURUS & TRILIUM \\ TYR1 & 39.7147 & 22.1684 & HT & 164 & CENTAUR & TRILLIUM \\ TYR2A & 39.6087 & 22.1291 & HT & 183 & CENTAUR & TRILLIIUM Compact \\ TYR3 & 39.7500 & 22.1049 & HT & 209 & CENTAUR & TRILLIUM Compact \\ TYR4 & 39.7919 & 22.1202 & HT & 312 & CENTAUR & TRILLIUM Compact \\ TYR5 & 39.8391 & 22.1023 & HT & 232 & CENTAUR & TRILLIUM Compact \\ TYR6 & 39.6895 & 22.0781 & HT & 462 & CENTAUR & TRILLIUM Compact \\ LRSO & 39.6713 & 22.3917 & HT & 78 & Reftek-130 & CMG-3 ESP/100 \\ AGG & 39.0211 & 22.3360 & HT & 622 & CMG-3 ESP/100 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Characteristics of the seismological stations in the broader area of Greece, the data from which were used in this study. Station coordinates are in decimal degrees; the elevation is in m. HL denotes the seismological network of the National Observatory of Athens; HT represents the seismological network of the University of Thessaloniki; MN designates the stations that belong to the MedNet (Mediterranean Seismological Network).