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Krylov A. A. Lobkovsky L. I. Rukavishnikova D. D. Baranov B. V. Kovachev S. A. Dozorova K. A. Tsukanov N. V. Semiletov I. P. 《Doklady Earth Sciences》2022,507(1):936-940
Doklady Earth Sciences - The results of new local seismic observations in the Laptev Sea obtained using ocean bottom seismographs were compared with actual data from global and regional earthquake... 相似文献
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Baranov B. V. Flint M. V. Rimskiy-Korsakov N. A. Poyarkov S. G. Dozorova K. A. 《Doklady Earth Sciences》2018,480(1):671-673
Doklady Earth Sciences - New structural data obtained by a geophysical survey during Cruise 69 of the R/V Akademik Mstislav Keldysh in 2017 indicate that the Khatanga−Lomonosov fault zone is... 相似文献
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L. I. Lobkovsky B. V. Baranov K. A. Dozorova R. Kh. Mazova B. A. Kisel’man N. A. Baranova 《Oceanology》2014,54(4):519-531
The “seismic silence” period in the seismic gap in the region of the Komandor Islands (hereinafter, the Komandor seismic gap) is close to the duration of the maximal recurrence interval for the strongest earthquakes of the Aleutian Islands. This indicates the possibility of a strong earthquake occurring here in the nearest time. In the present work, the results of simulation for a tsunami from such an earthquake are presented. The scheme successfully used by the authors for the nearest analog—the 2004 Sumatra-Andaman earthquake—is applied. The magnitude of the supposed earthquake is assumed to be 9.0; the tsunamigenic source is about 650 km long and consists of 9 blocks. The parameters of the tsunami propagation in the Pacific Ocean and the characteristics of the waves on the coasts are computed for several possible scenarios of blocks’ motion. The spectral analysis of the obtained wave characteristics is made and the effects of the wave front interference are found. Simulation has shown that the wave heights at some coastal sites can reach 9 m and, thus, may cause considerable destruction and deaths. 相似文献
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B.?V.?BaranovEmail author L.?I.?Lobkovsky K.?A.?Dozorova D.?D.?Rukavishnikova 《Oceanology》2017,57(3):439-443
Analysis of geophysical data obtained during a study of the insular slope in the central Kuril?Kamchatka Trench during projects Kuriles-2005 and Kuriles-2006 promoted by the Presidium of the Russian Academy of Sciences revealed a large submarine landslide in this area. The landslide, located at the bottom of the transverse valley confined to the Bussol l Graben, resulted from the failure of the northeastern wall of a graben composed of sedimentary material. It exceeds 35 km3 in size, representing one of the large submarine landslides discovered to date on the slope of the Kuril?Kamchatka Trench in submarine canyonfan environments. 相似文献
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I. P. Kuzin L. I. Lobkovskii K. A. Dozorova 《Journal of Volcanology and Seismology》2017,11(1):90-102
The deep-focus Sea of Okhotsk earthquake that occurred on May 24, 2013 (h = 630 km, M w = 8.3) was accompanied by anomalous effects that were unknown previously. A combined analysis of published data concerning the source rupture evolution and some features of the deep structure provided an explanation of some anomalous effects, such as the large number of aftershocks and the low level of ground shaking in the epicentral area. However, GPS observations revealed high coseismic vertical displacements in the area. The seafloor uplift in the Sea of Okhotsk and the adjacent coasts was 3–12 mm, peaking at the approximate center of the sea, while Kamchatka and the North Kuril Islands subsided by 3–18 mm, peaking at the Apacha station 190 km east of the earthquake epicenter. These maximum estimates are 1.2–1.8 times the analogous values (10 mm) for the Chile mega-earthquake of May 20, 1960 (M w ~ 9.5). It is known that the large distances at which ground shaking is felt during deep-focus earthquakes are due to the fact that the body waves travel through the high-Q lower mantle. However, this does not explain the paradox of the present earthquake in the Sea of Okhotsk, viz., a constant intensity of shaking (two grades) in the range of epicentral distances between 1300 and 9500 km. The explanation requires consideration of the earth’s free oscillations excited by the earthquake. 相似文献
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Baranov B. V. Lobkovsky L. I. Rukavishnikova D. D. Dozorova K. A. 《Doklady Earth Sciences》2020,491(1):160-163
Doklady Earth Sciences - Contourite drifts were first detected in the Tatar Strait in the framework of the Sakhalin Slope Gas Hydrates International Project (2012–2015). The number of... 相似文献
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On the basis of bathymetric and seismic data, obtained during cruises 37 (2005) and 41 (2006) of R/V Akademik M.A. Lavrentiev, a new structural scheme of transverse faults in the forearc of the Central Kuril Islands was compiled, the fault kinematics was studied, and a model of the extension zone in the structural pattern of the study area was proposed. According to this model, the trench rollback and development of back-arc basins resulted from the continuous supply of material into the upper mantle convection cell owing to subduction and an increase in the dynamic pressure that pushes the subducting plate, causing it to migrate toward the ocean. 相似文献
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Oceanology - The specific morphology of the inner and outer slopes of the eastern Kuril–Kamchatka Trench were revealed based on joint study of bathymetry and seismic profiles obtained in two... 相似文献