Seismic instruments: article

Unification of magnitudes of Eurasian Arctic modern earthquakes
A.N. Morozov 1,2 N.V. Vaganova 2 Ya.A. Mikhailova 2 I.V. Starkov 2,3
1 Schmidt Institute of Physics of the Earth, Russian Academy of Science 2 Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences 3 Ural Federal University
Journal: Seismic instruments
Tome: 58
Number: 1
Year: 2022
Pages: 67-80
UDK: 550.34
DOI: 10.21455/si2022.1-4
Keywords: magnitude, Arctic, correlation ratios, earthquakes, seismic hazard
Аnnotation: The article presents the results of identifying correlation relationships between magnitudes of different types, calculated in international and regional seismological centers. An increase in the number of seismic stations in the Arctic in the 21st century and, accordingly, an increase in the number of recorded earthquakes due to a decrease in the threshold magnitude of registration makes it possible to identify quantitative relationships between magnitudes based on large samples of earthquakes and in a wide range of magnitudes. Based on data from the International Seismological Center for the period from 1995 to 2020 30 ratios between magnitudes of different types were obtained, calculated at different Centers, in particular in the range of magnitudes from 2.6 for mb and MS and 0.8 for ML. The identified links will allow creating a consolidated unified catalog of earthquakes in certain regions of the Arctic, which is necessary, first of all, for assessing the seismic hazard of territories, as well as for studying low-magnitude earthquakes, their clusters, and swarms.