# Integrated Earthquake Catalog of the Ossetian Sector of the Greater Caucasus
## 2 Materials and Methods  
Figure 1 presents the region studied (42\({}^{\circ}\) N, 43\({}^{\circ}\) E; 44.5\({}^{\circ}\) N, 43\({}^{\circ}\) E; 44.5\({}^{\circ}\) N, 45.5\({}^{\circ}\) E; 42\({}^{\circ}\) N, 45.5\({}^{\circ}\) E). It includes the territory of the Republic of North Ossetia-Alania and adjacent territories (hereinafter referred to as the Ossetian sector of the Greater Caucasus). The integrated earthquake catalog with a unified magnitude scale is created for this region in the present paper. To create the integrated earthquake catalog of the Ossetian sector of the Greater Caucasus, the following 5 input catalogs were used (Table 1):  
1. The catalog of the Caucas from the annual journal _Earthquakes in the USSR 1962-1991_ (hereinafter _ZEMSUI_);
2. The catalog of the North Caucas from the annual journals _Earthquakes in Northern Eurusia 1992-2017_ and _Earthquakes in Russia_ 2018-2021 (hereinafter NC);
3. The catalog of Georgia from the annual journal _Earthquakes in Northern Eurusia 1993-2004_ (hereinafter _GEOR04_);
4. The earthquake catalog of the Caucasus from the annual journal _Seismic Bulletin of the Caucasus 1971-1986_ (hereinafter _GEOR71_), published under the scientific and methodological guidance of the Institute of Geophysics of the Academy of Sciences of the Georgian SSR (today, the M. Nodia Institute of Geophysics);  
Figure 1: The studied region—the Ossetian sector of the Greater Caucasus. Earthquakes from the GS RAS catalogs are marked in brown, events from the ISC catalog with magnitude definitions \(mb^{\text{ISC}}\) and \(mb^{\text{NEC}}\) are marked in blue, and events with magnitude definitions \(MW^{\text{GCMT}}\) are marked in red. The solid red line is the state border of the Russian Federation. The thin red line is the border of the Republic North Ossetia–Alania. The catalog of the International Seismological Centre ISC 1962-2022. The ISC catalog is composite and contains data from a number of global as well as Russian agencies (Table 2). According to the data on the nature of events in the input catalogs, there are few \"non-earthquakes\" in Ossetia. In the North Caucasus catalog, NC 41 events are marked as an explosion. There are 3 non-earthquakes (explosions) in the ISC catalog. These events were excluded from the input catalogs. Afterwards, a cross-check was carried out and 2 explosions were found in both catalogs, which were also removed (Table 1). No additional checks were performed after merging catalogs. Earthquakes with unknown magnitude/class were also excluded from consideration. Events were selected within the studied region. As noted above, the author's method, used in the present study to identify duplicates that arise when earthquake catalogs are sequentially merged, is described in detail in [1] \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Catalog** & **Period** & **Number of Events** & **Number of Earthquakes with Energy Classes and/or Magnitudes** & **Number of Non-Earthquakes** \\ \hline ZEMSU & 1962–1991 & 1258 & 1258 & 0 \\ NC & 1992–2021 & 12,442 & 12,399 & 41 + 2 * \\ GEOR04 & 1993–2004 & 572 & 572 & 0 \\ GEOR71 & 1971–1986 & 2412 & 2412 & 0 \\ ISC & 1962–2022 & 3923 & 3918 & 3 + 2 ** \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Input catalogs.