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Tamaz L. Chelidze Ia Shengelia Natalya Zhukova Teimuraz Matcharashvili George Melikadze Genady Kobzev 《Acta Geophysica》2016,64(3):567-588
Presently, there are a lot of observations on the significant impact of strong remote earthquakes on underground water and local seismicity. Teleseismic wave trains of strong earthquakes give rise to several hydraulic effects in boreholes, namely permanent water level changes and water level oscillations, which closely mimic the seismograms (hydro-seismograms). Clear identical anomalies in the deep borehole water levels have been observed on a large part of the territory of Georgia during passing of the S and Love–Rayleigh teleseismic waves (including also multiple surface Rayleigh waves) of the 2011 Tohoku M9 earthquake. The analysis carried out in order to find dynamically triggered events (non-volcanic tremors) of the Tohoku earthquake by the accepted methodology has not revealed a clear tremor signature in the test area: the Caucasus and North Turkey. The possible mechanisms of some seismic signals of unknown origin observed during passage of teleseismic waves of Tohoku earthquake are discussed. 相似文献
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Of the stable indications of elementary soil processes those are to be identified which are taking place in the fine-dispersed fractions of soil by transformations of layer silicates and primarily of interstratified formations.Instrumental detection of transformations in the fine-dispersed material and of its migration along paleosol profiles allows a comparison with changes in recent soils and a judgement about the conditions of paleosol formation. This presumption is supported by data on the mineral composition of the fine-dispersed fractions of the Mikulino interglacial soils as a product of the first phase of pedogenesis within the Mezin loess- paleosol complex (Morozova et al. 1979) and, in general, of the loess-paleosol sequence developed above the ground moraine of the Don glacier tongue containing paleosols formed in the Early, Middle and Late Pleistocene (Velichko et al. 1965). 相似文献
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Alexey Nikolaevich Morozov Natalya V. Vaganova Vladimir E. Asming Yana V. Konechnaya Zinaida A. Evtyugina 《Journal of Seismology》2018,22(5):1171-1209
We have relocated seismic events registered within the Barents and Kara sea region from early twentieth century to 1989 with a view to creating a relocated catalog. For the relocation, we collected all available seismic bulletins from the global network using data from the ISC Bulletin (International Seismological Centre), ISC-GEM project (International Seismological Centre–Global Earthquake Model), EuroSeismos project, and by Soviet seismic stations from Geophysical Survey of the Russian Academy of Sciences. The location was performed by applying a modified method of generalized beamforming. We have considered several travel time models and selected one with the best location accuracy for ground truth events. Verification of the modified method and selection of the travel time model were performed using data on four nuclear explosions that occurred in the area of the Novaya Zemlya Archipelago and in the north of the European part of Russia. The modified method and the Barents travel time model provide sufficient accuracy for event location in the region. The relocation procedure was applied to 31 of 36 seismic events registered within the Barents and Kara sea region. 相似文献
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Three archaeological sites of the Bronze and Early Iron Ages were investigated using palynological methods. To interpret the fossil spectra more accurately, recent pollen from alluvium, surface soil and cultural layers within modern villages were also studied in the area. During the time interval when the ancient cultural layers accumulated, thinned-out birch forests were replaced by mixed coniferous and broad-leaved trees. This might have been caused by climatic transition which possibly influenced the changing cultural traditions within the area. The climatic transition also includes a change in humidity. The wettest stages are recorded by pollen data during the transition period between the Bronze and Early Iron Age. This corresponds to the Subboreal/Subatlantic boundary within the European Holocene (around 2500 yr B.P.). © 1994 John Wiley & Sons, Inc. 相似文献
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Morozov Alexey N. Vaganova Natalya V. Konechnaya Yana V. Asming Vladimir E. Dulentsova Ludmila G. Evtyugina Zinaida A. 《Journal of Seismology》2021,25(5):1171-1188
Journal of Seismology - A permanent seismic station was for the first time installed on Severnaya Zemlya in the Russian Arctic. This made it possible to record low-magnitude earthquakes occurring... 相似文献
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Lake-margin ecosystems of saline lakes of the Borzya group (Zabaikalsky Krai,Russia) during the initial filling phase 总被引:1,自引:0,他引:1
Evgenia R GORLACHEVA Gazhit Ts. TSYBEKMITOVA Alexey V. AFONIN Natalya A. TASHLIKOVA Ekaterina Yu. AFONINA Alexey P. KUKLIN Natalia V. SALTANOVA 《中国海洋湖沼学报》2014,32(4):871-878
This article presents the results ofhydrochemical and hydrobiological studies of shallow saline lakes of the Borzya group (Zabaikalsky K_rai, Russia) at the initial filling phase. The lake-margin ecosystems of the studied lakes are characterized by varying degrees of salinity from polyhaline to brine water. Cyclical variations of meteorological conditions and high salinity determined that the compositions of the aquatic organisms are specific, mostly between stenohaline and euryhaline species, the quantities are low, and the community structures are simple. 相似文献