## 4 Results
### Localization Solutions
Source: CSEM—EMSC Available at: <[[https://www.emsc-csem.org/](https://www.emsc-csem.org/)]([https://www.emsc-csem.org/](https://www.emsc-csem.org/))> (accessed on 8 June 2022) [4]. 4.1.1. The ML 6.0, Eliassona, 3 March 2021 (10:16:08.3 UTC)  
A strong earthquake, ML = 6.0, occurred in the broader area of Thessaly, Central Greece, on 3 March 2021 (10:16:08.39, UTC). The geographical coordinates, as they were calculated manually for the scope of this study, were \(\varphi\) = 39.7453\({}^{\circ}\) N, \(\lambda\) = 22.2340\({}^{\circ}\) E at a depth of 12 km (Figure 5). The phases used to calculate the epicenter were 124 phases from P- and S-waves at epicentral distances between 3 and 265 km and an azimuthal gap of 24\({}^{\circ}\) \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline  & & & & & & & & & & & \\ \hline \multicolumn{1}{c}{**Elassona Earthquake (3 March 2021, 10:16:08.39, UTC) M\({}_{\rm w}\) = 6.3**} & \multicolumn{1}{c}{} & & & & & & & \\ \hline \multicolumn{1}{c}{**Institute**} & \multicolumn{1}{c}{**Latitude**} & \multicolumn{1}{c}{**Longitude**} & \multicolumn{1}{c}{**M\({}_{\rm w}\)**} & \multicolumn{1}{c}{**M\({}_{\rm g}\)**} & \multicolumn{1}{c}{**Depth**} & \multicolumn{1}{c}{**Strike**} & \multicolumn{1}{c}{**Dip**} & \multicolumn{1}{c}{**Rake**} & \multicolumn{1}{c}{**Strike**} & \multicolumn{1}{c}{**Dip**} & \multicolumn{1}{c}{**Rake**} \\  & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} & \multicolumn{1}{c}{(\({}^{\circ}\))} \\ \hline Our Study & 39.7916 & 22.1274 & 6.2 & \(2.6149\times 10^{25}\) & 18.0 & 140 & 42 & \(-\)86 & 300 & 40 & \(-\)90 \\ GFZ & 39.8000 & 22.2000 & 6.3 & \(3.300\times 10^{25}\) & 17.0 & 146 & 48 & \(-\)91 & 329 & 41 & \(-\)88 \\ NOA & 39.7710 & 22.0958 & 6.0 & \(1.364\times 10^{25}\) & 11.3 & 112 & 59 & \(-\)87 & 287 & 31 & \(-\)95 \\ AUTH & 39.7800 & 22.1200 & 5.9 & \(9.300\times 10^{24}\) & 7.0 & 109 & 60 & \(-\)89 & 287 & 30 & \(-\)92 \\ UOA & 39.7708 & 22.0918 & 6.1 & \(2.0300\times 10^{25}\) & 15.0 & 131 & 40 & \(-\)88 & 308 & 50 & \(-\)92 \\ \hline \end{tabular}
\end{table} 
Table 2: _Cont._  
Figure 4: Black lines correspond to the main active faults for the study area—a general seismicity map of the broader area of the Thessalian, Central Greece. Light blue rectangles denote the cities of the study area. The stars represent the events in the study area for 3 March 2021–31 December 2021. More distant stations indicated a longer extensive duration for P- and S-waves because of the simultaneous arrival of refracted and reflected P- and S-waves as well as sP-waves. Figure 5a represents the geographical distribution of the stations that were used to calculate the epicenter, and Figure 5b shows a graph of the distance (km) versus residual (s) stations. Finally, the green circles denote the stations where only vertical components (P-waves) were used, while the green squares represent the stations where vertical and horizontal components (P-waves and S-waves) were used. Figure 6 shows a section of the displacement record of the broadband seismological data from the mainshock. In local station records, both P and S direct-body waves exhibited durations shorter than 2 s.  
The first strong aftershock occurred a few hours later at 11:45:45.99 (UTC) with a magnitude M\({}_{\rm L}\) = 5.1. A rich sequence followed these events, more specifically, from the main event's time, and for the next 24 h, there were 268 seismic vibrations with a magnitude greater than 1 (Figure 7a). When monitoring the seismic sequence over the first month, 2268 aftershocks occurred, 34 with a magnitude M\({}_{\rm L}\geq\) 4.0.