scholarly journals EAST EUROPEAN PLATFORM. RUSSIAN PART

2020 ◽  
pp. 199-207
Author(s):  
Irina Gabsatarova ◽  
B. Assinovskaya ◽  
S. Baranov ◽  
V. Karpinsky ◽  
D. Mehryushev ◽  
...  
Keyword(s):  
East European Platform ◽  
Local Networks ◽  
Strong Earthquakes ◽  
Seismic Stations ◽  
Voronezh Crystalline Massif ◽  
East European ◽  
Russian Territory ◽  
Kandalaksha Bay ◽  
International Monitoring ◽  
Test Ban

It is reported that 22 stationary seismic stations, 2 arrays and 7 local seismic stations, located in the area of Novovoronezh and Kursk nuclear stations, monitor seismicity of the Russian territory of the East European platform (EEP). A new station Belogornoe with high registration class has been opened, which also belongs to the International Monitoring System for the Comprehensive Nuclear-Test-Ban Treaty (IMS CTBTO). The results of the microseismic noise study at the Pulkovo network stations and assessment of maximum distance of earthquake registration in the Voronezh crystalline massif are presented. In 2014, relatively strong earthquakes with М3.0 were not recorded on the Russian territory of the EEP. Weaker natural seismicity with M≤2 was recorded in Karelia and the border areas with Finland, near Kandalaksha Bay, near the Khibiny Massif on the Kola Peninsula and on the territory of the Voronezh Crystalline Massif. Observations of local networks near nuclear stations are aimed at updating the information on seismicity previously considered as an aseismic territory of the EEP. Man-made events were recorded in permanent quarries, the most powerful of them (M=3.1–3.3) were produced in the quarries on the territory of the Kursk magnetic anomaly.

scholarly journals SEISMICITY of the RUSSIAN PART of EAST EUROPEAN PLATFORM and ADJACENT TERRITORIES in 2015

2021 ◽  
pp. 182-191
Author(s):  
I. Gabsatarova ◽  
B. Assinovskaya ◽  
S. Baranov ◽  
V. Karpinsky ◽  
Ya. Konechnaya ◽  
...  
Keyword(s):  
Noise Level ◽  
East European Platform ◽  
Focal Mechanisms ◽  
Seismic Stations ◽  
East European ◽  
Russian Territory ◽  
Kandalaksha Bay ◽  
Kaliningrad Region ◽  
Macroseismic Survey ◽  
Natural Seismicity

It is reported that 41 stationary seismic stations, 2 arrays, and 7 temporary seismic stations, located in the area of Novovoronezh and Kursk nuclear stations, monitored seismicity of the Russian territory of the East European Platform (EEP) in 2015. The registration capabilities of the seismic network at the EEP as a whole were estimated based on the average station noise level and the equation for the energy decay of seismic phases. Zones with the best capabilities have been allocated. A feature of seismicity in 2015 is the manifestation of earthquakes of moderate magnitudes (ML=2.7–3.9) in the peripheral regions (in the southwest, west, and northwest) and in zones associated with paleorift structures: in the southwest – with the Dnieper Donetsk and in the northeast – with the Kirov-Kazhim and Soligalich (Central Russian) aulacogenes. The results of the macroseismic survey are given for the earthquake in Poltava on February 2, 2015, with M=3.7; focal mechanisms of two earthquakes (03.02.2015 and 12.06.2015) are constructed. According to the data of the Latvian Center, an earthquake was recorded in the region of Lithuania bordering the Kaliningrad region. Weaker natural seismicity with ML≤2.5 was recorded in Karelia and the regions bordering with Finland, near the Kandalaksha Bay, near the Khibiny, and Lovozersky massifs on the Kola Peninsula, and on the territory of the Voronezh crystalline massif.

scholarly journals Seismogenic ancient structures of the central and northern part of the East European platform

2019 ◽  
Vol 489 (4) ◽  
pp. 405-408
Author(s):  
V. V. Adushkin ◽  
I. A. Sanina ◽  
G. N. Ivanchenko ◽  
E. M. Gorbunova ◽  
I. P. Gabsatarova ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Seismic Activity ◽  
East European Platform ◽  
Historical Earthquakes ◽  
Seismic Array ◽  
Small Aperture ◽  
Seismic Stations ◽  
East European

The analysis of the location of the epicenters of earthquakes that occurred in the central and northern part of the East European platform in 2009-2016, recorded by the seismic stations of the GS RAS and the small aperture seismic array of IGD RAS Mikhnevo was performed. The results obtained indirectly indicate the seismic activity of the Riphean structures of the region, disturbing the surface of the basement, and their possible activation at the present time. Available data on historical earthquakes also confirm their relevance to paleorifts. It seems important to take into account the position of the ancient aulacogens in assessing the seismic hazard of the East European platform.

Devonian volcanics in the Voronezh Crystalline Massif, East European Platform: Evolution of the melts and characteristics of crustal contamination

Petrology ◽  
2017 ◽  
Vol 25 (3) ◽  
pp. 241-271 ◽  
Author(s):  
E. V. Yutkina ◽  
A. A. Nosova ◽  
L. V. Sazonova ◽  
Yu. O. Larionova ◽  
I. A. Kondrashov ◽  
...  
Keyword(s):  
East European Platform ◽  
Crustal Contamination ◽  
Voronezh Crystalline Massif ◽  
East European ◽  
Platform Evolution

scholarly journals Performance of the International Monitoring System Seismic Network Based on Ambient Seismic Noise Measurements

2021 ◽  
Author(s):  
Peter J. Gaebler ◽  
Lars Ceranna
Keyword(s):  
Monitoring System ◽  
Body Wave ◽  
Seismic Network ◽  
International Monitoring System ◽  
Detection Capability ◽  
Seismic Stations ◽  
Nuclear Explosions ◽  
International Monitoring ◽  
Test Ban ◽  
Body Wave Magnitude

AbstractAll nuclear explosions are banned by the Comprehensive Nuclear-Test-Ban Treaty. In the context of the treaty a verification regime was put into place to detect, locate, and characterize nuclear explosions at any time, by anyone and everywhere on the Earth. The International Monitoring System, which plays a key role in the verification regime, was set up by the Preparatory Commission of the Comprehensive Nuclear-Test-Ban Treaty Organization. Out of the several different monitoring techniques applied in the International Monitoring System the seismic waveform approach is the most effective and reliable technology for monitoring nuclear explosions underground. This study introduces a deterministic method of threshold monitoring that allows to asses a lower body wave magnitude limit of a potential seismic event in a certain geographical region, that can be detected by those seismic stations being part of the International Monitoring System network. The method is based on measurements of ambient seismic noise levels at the individual seismic stations along with global distance corrections terms for the body wave magnitude. The results suggest that an average global detection capability of approximately body wave magnitude 4.0 can be achieved using only stations from the primary seismic network of the International Monitoring System. The incorporation of seismic stations from the auxiliary seismic network leads to a slight improvement of the detection capability, while the use and analysis of wave arrivals from distances greater than 120$$^\circ$$ ∘ results in a significant improvement of the detection capability. Temporal variations in terms of hourly and monthly changes of the global detection capability can not be observed. Overall, comparisons between detection capability and manually retrieved body wave magnitudes from the Reviewed Event Bulletin suggest, that our method yields a more conservative estimation of the detection capability and that in reality detection thresholds might be even lower than estimated.

The morphology and ultrastructure of pollen grains of Scutasporites nanuki Utting (Sashiniaceae, Coniferales) from the Permian of the East-European Platform

Palaeobotany ◽  
2012 ◽  
Vol 3 ◽  
pp. 5-11
Author(s):  
A. V. Gomankov ◽  
V. F. Tarasevich
Keyword(s):  
East European Platform ◽  
Central Body ◽  
Pollen Grains ◽  
Irregular Shape ◽  
East European ◽  
Sem And Tem

Dispersed bisaccate pollen grains of Scutasporites nanuki were studied by means of LM, SEM and TEM. Sacci ultrastructure of these pollen grains was rather peculiar. Sacci were like a thin fi lmy fringe attached to the central body near the equator. They were fi lled with sporopollenin elements of irregular shape and various dimensions with equally various cavities between them. Such an ultrastructure is called as spongy. The morphology and ultrastructure of S. nanuki is discussed in the context of the evolution of early conifers.

The quasiplatform sediments of the East European Platform

2005 ◽  
Vol 7 (5) ◽  
pp. 1-12
Author(s):  
M. A. Nagornyi ◽  
V. G. Nikolaev
Keyword(s):  
East European Platform ◽  
East European

Nd isotope composition of the Ediacaran and earliest Cambrian phosphorite nodules and Fe sulphide from the East European Platform

2020 ◽  
Vol 157 (12) ◽  
pp. 2081-2088
Author(s):  
Sergey B Felitsyn ◽  
Eugeny S. Bogomolov
Keyword(s):  
East European Platform ◽  
Isotope Composition ◽  
Water Reservoir ◽  
Secular Change ◽  
Early Cambrian ◽  
Iron Sulphide ◽  
Nd Isotope ◽  
East European ◽  
Moscow Syneclise ◽  
Nd Isotope Composition

AbstractAn enhanced concentration of phosphorus has been found at the stratigraphic level of the disappearance of Ediacaran taxa in two areas, the Cis-Dniester region and the Moscow syneclise, on the East European Platform (EEP). The isotope composition of neodymium was determined in Fe sulphide and phosphorite in the same beds. Measured εNd(t) values in diagenetic phosphate nodules are similar to those in iron sulphide from the same layer. During the Ediacaran − Early Cambrian, accumulation of radiogenic Nd in the epeiric basins on the EEP increased progressively from −17.9 and −19.4 in pyrite from the sequence bottom to −7.9 and −8.5 in the Early Cambrian pyrite of the central part of the EEP. The Ediacaran phosphate nodules show εNd(t) ranging from −12.9 to −15.0, while that in the Early Cambrian nodules is typically c. −9.0. These data indicate the secular change in Nd isotope composition of the water reservoir on the EEP from Ediacaran to Cambrian.

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