# Integrated Earthquake Catalog of the Ossetian Sector of the Greater Caucasus
## 4 Conclusions  
In this article, by the system integration of data on seismic events from Soviet, Russian, and Georgian catalogs, as well as ISC, the most complete representative earthquake catalog with a unified magnitude scale was elaborated for the Ossetian sector of the Greater Caucasus (the territory of the Republic North Ossetia-Alania and adjacent ar  
Figure 15: The magnitude of complete registration \(Mc\): (**a**) spatial–temporal variations; (**b**) spatial variations 1995–2004; (**c**) spatial variations 2005–2022. \(Mc\) level lines: dark red \(Mc\) = 2.0, yellow \(Mc\) = 2.2, blue \(Mc\) = 3.0, green \(Mc\) = 3.1. The solid black line is the state border of the Russian Federation; the thin line is the border of the Republic North Ossetia–Alania. eas). The integrated catalog contains 16,285 events for the period 1962-2022. The map of the earthquake epicenters is presented in Figure 13. The earthquake catalog of the Ossetian sector of the Greater Caucas that was compiled in the present paper is available for the public on the website of the World Data Center for Solid Earth Physics, Moscow at [[http://www.wdcb.ru/sep/seismology/Ossetia/Ossetia.html](http://www.wdcb.ru/sep/seismology/Ossetia/Ossetia.html)]([http://www.wdcb.ru/sep/seismology/Ossetia/Ossetia.html](http://www.wdcb.ru/sep/seismology/Ossetia/Ossetia.html)) (accessed on 27 November 2023). Based on the results obtained in the present study, the authors consider it possible to draw the following conclusions:  
1. The territory of the considered region of the Central Caucasus (Figure 1) is quite well-represented in Soviet, Russian, and Georgian catalogs (in particular in the catalogs of the GS RAS). The share of events from ISC in the integrated catalog is about 5%. At the same time, the beginning of the aftershock sequence of the Racha earthquake was significantly replenished. The estimated number of errors in identifying duplicates is about 1%;
2. The integration of Soviet and modern Russian and Georgian catalogs made it possible to significantly increase the completeness and representativeness of seismic events in the studied Ossetian sector of the Greater Caucasus. Thus, for the period 1971-1986, the integrated catalog contains 71.8% from the GEOR71 catalog and 26.4% from ZEMSU, i.e., a significant number of events were found in the catalog of the regional seismological center for these years;
3. The large majority of events in the integrated catalog have magnitudes \(MW^{\rm GCMT}\), \(mb^{\rm ISC,NEIS}\) and/or energy class, and less than 1% have other types of magnitude. The correlation relationships between \(MW^{\rm GCMT}\), \(mb^{\rm ISC,NEIS}\), and energy class \(k\) are well established. Based on this, the obtained unified magnitude scale is considered reliable;
4. In the studied Ossetian sector of the Greater Caucasus, the level of registration varies greatly over time. There is a significant lack of events in the periods 1967-1970 and 1988-1991. Since 1995, the catalog is complete for magnitude 3.2, and since 2005 for magnitude 2.2;
5. The created integrated earthquake catalog with a unified magnitude scale can be used by a wide range of researchers studying the seismic regime and seismic hazard of the Central Caucasus [32; 33; 34; 35; 36]. The results of the present paper are important for studying the seismic regime and regional assessments of seismic hazard. 6. The magnitude-frequency graphs for the integrated catalog with a unified \"proxy-\(MW\)\" magnitude and the GS RAS catalog of the North Caucasus for 2005-2021 were constructed and compared (Figure 16). For the events from the GS RAS catalog, the magnitude Ms is used if known or the magnitude recalculated from the energy class k using T.G. Rautian ratio M = (k \(-\) 4)/1.8 [37]. The magnitude-frequency graphs and estimates for the parameters of the Gutenberg-Richter law differ significantly, which may affect the seismic hazard assessment results. 7.