Results of seismological observations on the territory of the Republic of North Ossetia-Alania and adjacent areas in 2020

Abstract

North-Ossetian Division of the Geophysical Survey of the Russian Academy of Sciences (NOD GS RAS) carries out the continuous seismological observations of the central part of the North Caucasus region. The branch's seismological network includes 12 observation points located on the territory of the Republic of North Ossetia-Alania. The paper provides basic information about the places of installation of seismic stations and their equipment, and notes the registration possibilities of the network. The total number of registered seismic events and separately within the administrative territories in 2020 is given. The total released seismic energy is calculated. A comparison of the energy indicator with the previous year is given. The schedule of repeatability is calculated and constructed, which indicates the level of reliability of event registration. The analysis of the earthquakes foci distribution with ref-erence to geotectonic structures is presented on the map of the epicenters of recorded seismic events with an indication of the distribution against the background of the focal zones. Iden-tified and described the swarm sequences of seismic events, which occurred in the territories of the Republics of North Ossetia-Alania and Kabardino-Balkaria, as well as in the Stavropol Territory. The mechanisms of the foci for the three most powerful earthquakes are deter-mined and their stereograms are given. The obtained results will allow us to study the chang-es in the seismic regime of the North Caucasus region more effectively.

Integrated Earthquake Catalog of the Ossetian Sector of the Greater Caucasus

“…Today the network includes 12 observation points, which are equipped with 10 short-period and 2 broadband seismic stations (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, accessed on 27 November 2023), which continuously record seismic events in the territory of Dagestan and adjacent areas [12].…”