Affiliation:
1. Geophysical Survey of the Russian Academy of Sciences (GSRAS), Obninsk, Russia.
Abstract
The data on the seismicity of the Earth in the second half of 2020 at the level of strong earthquakes with magnitudes mb≥6.0 are given according to the data of the Alert Service of the Geophysical Survey RAS. The review also includes information on 54 tangible earthquakes in Russia and five earthquakes in adjacent territories that were felt in the settlements of the Russian Federation. Two of 67 strong earthquakes of the Earth with mb≥6.0 for the period under consideration were registered in the territory of Russia. For 15 strong earthquakes, the Alert Service published Information Messages within one or two days after their occurrence, for 14 earthquakes the information on focal mechanisms is provided. The strongest earthquake of the Earth with MS=7.9 occurred on July, 22 in the region of the Alaska Peninsula. The maximum human casualties and material damage during the study period were the result of the catastrophic intraplate earthquake with MS=6.8, which occurred on October, 30 in the Aegean Sea, near the Samos Island. As a result of the earthquake, 117 people died, 1054 were injured. The strongest earthquake on the territory of Russia was the deep-focus one with mb=6.4, which took place on November, 30 in the Tatar Strait, separating Sakhalin Island from continental Eurasia. The crustal Bystrinsk earthquake on September, 21 with MS=5.2, which occurred in the area of Lake Baikal, was felt with a maximum intensity I=6–7 on the territory of Russia. Comparative analysis of the rate of seismic energy released in the Globe in 2010-2020 showed that its value in the second half of 2020, as well as for 2019-2020 on average, is one of the lowest for the eleven-year period and indicates a seismic calm, which should be replaced by a period of intensification of global seismic and deformation processes
Publisher
Geophysical Survey of the Russian Academy of Sciences - GS RAS
Reference37 articles.
1. Akimov, A.P., & Krasilov, S.A. (2020). [WSG software package "Seismic data processing system"]. Cer-tificate of state registration of a computer program No. 2020664678. (In Russ.).
2. Ambraseys, N.N., & Free, M.W. (1997). Surface-wave magnitude calibration for European region earth-quakes. Journal of Earthquake Engineering, 1(1), 1-22. DOI: https://doi.org/10.1080/13632469708962359
3. Baza dannykh «Zemletriaseniia» Sluzhby srochnykh donesenii. Informatsionnye resursy FITs EGS RAN [Earthquake Database of the Earthquake Early Alert Service. Information resources of the GS RAS]. (2021). Retrieved from http://www.ceme.gsras.ru/new/infres/ (In Russ.).
4. Bird, P. (2003). An updated digital model of plate boundaries. Geochemistry Geophysics Geosystems, 4(3), 1027. DOI: https://doi.org/10.1029/2001GC000252
5. Bormann, P. (2002). Magnitude of seismic events. CHAPTER 3: Seismic Sources and Source Parameters. In IASPEI New Manual of Seismological Observatory Practice (NMSOP) (pp. 16-46). GeoForschungsZentrum Potsdam, Germany.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献