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Now showing items 12817-12836 of 39126
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(2000)Variations in seismicity are considered in the area of two large Kamchatka earthquakes of June 21 (Mw = 7.0) and July 16, 1996 (Mw = 6.6). Both events were found to have been preceded by seismic quiescences terminating a ...
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(1991)Two calderas have been located in Lake Kurilskoe by seismic reflection profiling. One of them, Kurilskaya, is about 7 km across and occupies the central and southern parts of the lake. The other caldera, Il'inskaya,is ...
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(1996)In many areas of the world, the continental lithospheric upper mantle contains bright, continuous, regionally extensive, seismic reflectors. Despite the increasingly common observation of such mantle reflectors on deep ...
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(Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования «Пермский государственный национальный исследовательский университет», 2017)This paper presents the results of the seismic refraction modeling using finite differences method (FDM), implemented in the program from the open source package Seismic Unix (SUFDMOD2), and its comparison with the modeling ...
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(2003)We document strong seismic scattering from around the top of the mantle Transition Zone in all available high resolution explosion seismic profiles from Siberia and North America. This seismic reflectivity from around the ...
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(2004)Mineralogical phase transitions are usually invoked to account for the sharpness of globally observed upper-mantle seismic discontinuities. We propose a percolation-based model for the elastic properties of the phase mixture ...
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(2002)Detailed interpretation of single channel seismic reflection and Huntec deep-tow boomer and sparker profiles demonstrates that the southwestern Black Sea shelf formed by a protracted shelf-edge progradation since the ...
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(Общество с ограниченной ответственностью «Георесурсы», 2018)The distribution of fracturing and the type of fluid saturation in the geological environment, along with its structure, is the most important information for optimal development of oil and gas fields, including their ...
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(2003)On a large scale, seismic waves travel faster through old continental shields than through Paleozoic platforms. On a smaller scale, the continental lithosphere appears to be composed of blocks with different velocities. ...
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(2002)Tomographic images for four major continental rift zones, namely the southern Rhine Graben (SRG, Germany/France), the Gregory rift (Kenya) which is the central part of the East African rift system, the Rio Grande rift (RGR) ...
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(2009)We determine a 3-D P-wave velocity structure of the mantle down to 700 km depth under the Kamchatka peninsula using 678 P-wave arrival times collected from digital seismograms of 75 teleseismic events recorded by 15 portable ...
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(1999)Regional seismic tomography of the northwest Pacific island arcs using P- and S-wave arrival time data with similar path coverage reveals an oceanic lithospheric slab deflected in the mantle transition zone beneath the Izu ...
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(2004)The geological profile of many submerged slopes on the continental shelf consists of normally to lightly overconsolidated clays with depths ranging from a few meters to hundreds of meters. For these soils, earthquake loading ...
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(2001)We calculated seismic wave velocity anisotropy caused by the preferred orientation of mica minerals by using the differential effective medium method (DEM). Spheroidal biotite crystals with their c-axes coinciding with the ...
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(2001)A set of macroscopic equations of motion for inhomogeneous and anisotropic porous media is constructed. The porous medium considered consists of an elastic solid with interconnected void spaces filled with a chemically ...
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(1984)Seismic signals from large explosions recorded by Soviet seismic stations in the distance range from 100 to 2800 km during 12-14 years are analysed. Periodic variations of travel times and amplitudes of P and S waves ...
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(2004)The low-frequency mechanical properties of pure and Ca-doped lead orthophosphate, (Pb1–xCax)3(PO4)2, have been studied using simultaneous dynamical mechanical analysis, X-ray diffraction (XRD), and optical video microscopy ...
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(2003)Two explosive eruptions occurred on 2 January 1996 at Karymsky Volcanic Center (KVC) in Kamchatka, Russia: the first, dacitic, from the central vent of Karymsky volcano, and the second, several hours later, from Karymskoye ...
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(2001)The paper considers main peculiarities of neotectonic structure in respect to epicentre distribution in the Russian Far East South. For this purpose, epicentre distribution of earthquakes with M≥1.8 and M≥3.3, the averaged ...
Now showing items 12817-12836 of 39126