# Integrated Earthquake Catalog of the Ossetian Sector of the Greater Caucasus
###### Abstract  
This article is the continuation of a study by authors to create the most complete and representative earthquake catalogs with a unified magnitude scale. The catalog created of the Ossetian sector of the Greater Caucasus (the territory of the Republic of North Ossetia-Alania and adjacent areas) was formed by the aggregation of all available data from Soviet, modern Russian, and Georgian catalogs, as well as the data from the International Seismological Centre. The integration was carried out using the author's approach based on the modified nearest neighbor method. The integrated catalog of the Ossetian sector of the Greater Caucasus contains 16,285 events for the period 1962-2022. For all events, magnitude estimates are reduced to a unified \"proxy-\(MW\)\" scale. The integration of data from various sources made it possible to significantly replenish the beginning of the aftershock sequence of the Racha earthquake with \(MW=7.0\), which occurred on 29 April 1991. There has been a change in the level of registration over time. Thus, there is a significant lack of events for the periods 1967-1970 and 1988-1991; starting from 1995, the catalog is complete for magnitude 3.2, and since 2005 for magnitude 2.2. 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. This once again demonstrates both the fundamental importance of merging seismic data from global, national, and regional catalogs and the effectiveness of the author's developed method. merging catalogs; magnitude unification; Greater Caucasus; North Ossetian; duplicate events; earthquake catalog; completeness of earthquake catalog; representativeness of earthquakes 1 Currently, earthquakes occurring in the studied region are recorded by seismic networks of regional branches of the Geophysical Survey of the Russian Academy of Sciences (GS RAS) (North Ossetian branch, Dagestan branch, Kislovodsk Seismic Station), the Georgia's National Seismic Center, and international seismological agencies. The seismological observation network of the North Ossetian branch of the GS RAS (international network code--NOGSR) carries out continuous monitoring of seismic activity in the Republic of North Ossetia-Alania and adjacent territories. It covers the Central part of the North Caucasus, as well as South Ossetia and the border strip of the Republic of Georgia. Today the network includes 12 observation points, which are equipped with 10 short-period and 2 broadband seismic stations ([[https://sofgsras.ru](https://sofgsras.ru)]([https://sofgsras.ru](https://sofgsras.ru)), accessed on 27 November 2023). Data transmission from observation points to the processing center in Vladikavkaz is carried out in near real-time via telemetry channels [11]. The seismological observation network of the Dagestan branch of GS RAS (international network code--DAGSR) currently includes 17 seismic stations ([[http://dbgsras.ru](http://dbgsras.ru)]([http://dbgsras.ru](http://dbgsras.ru)), accessed on 27 November 2023), which continuously record seismic events in the territory of Dagestan and adjacent areas [12]. The Kislovodsk seismic station of GS RAS (international network code--KMGSR) includes 17 seismological observation points ([[http://eoru.gsras.ru/stations/index.php?inc=stalist&net=KMGSR](http://eoru.gsras.ru/stations/index.php?inc=stalist&net=KMGSR)]([http://eoru.gsras.ru/stations/index.php?inc=stalist&net=KMGSR](http://eoru.gsras.ru/stations/index.php?inc=stalist&net=KMGSR)), accessed on 27 November 2023) in the North Caucasus and Stavropol Territory [13]. Georgia's National Seismic Center (international network code--GO, [[https://ies.iliauni.edu.ge](https://ies.iliauni.edu.ge)]([https://ies.iliauni.edu.ge](https://ies.iliauni.edu.ge)), accessed on 27 November 2023) currently operates on the basis of the Institute of Earth Sciences.