Published in Izvestiya, Physics of the Solid Earth
Abstract—We present the results of laboratory studies of slope failure criteria by dynamic impulse loading in the range of peak ground velocities (PGV) between 0.003 and 1.3 m/s and peak ground accelerations (PGA) between 0.01 to above 170g. Critical parameter values of the dynamic loads acting on model slopes are established. The minimum PGA value...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Based on the alpha-shape computer-graphics analysis of coda envelope of the waves from nuclear explosions reflected from the inner core boundary (PKiKP), the estimates of the mechanical Q-factor are obtained for nine reflection regions beneath the Arctic, Central, and Southeast Asia with the average Q = 447 ± 43. The coda formation mechani...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Dynamics of complex plasma structures, that drive precipitation and current systems into the ionosphere, produce a multitude of physical and geophysical effects that present unresolved mysteries in our understanding of the cross-geospace coupling. High-altitude active experiments that produce high-speed plasma injections play a crucial rol...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Destruction on the Earth’s surface caused by a shock wave is one of the most important and dangerous effects from asteroid and comet impacts. The overpressure and wind speed behind the shock wave front, leading to various dangerous effects, can be estimated on the basis of specially developed models of the interaction of cosmic objects wit...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Numerical modeling of induced seismicity resulting from fluid injection into the subsurface is considered. One of important factors determining the slip dynamics of a tectonic fault during fluid injection loading is the form of the law of friction acting on the fault sides. The numerical analysis in the context of a slider model compared t...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Mass industrial explosions on extended benches of open pits are the most effective way to crush rock. Such explosions are accompanied by the rise of a gas and dust cloud. Three-dimensional numerical experiments are used to study the interaction of ascending gas and dust clouds generated by three, five, and multiple linearly arranged explos...
Published in Izvestiya, Physics of the Solid Earth
Abstract—The occurrence and evolution of plasma fluxes in the ionosphere is one of the factors that have a significant impact on the dynamics and state of the geophysical environment. The study of plasma and magnetohydrodynamic effects arising from the motion of plasma jets in real space is complicated by the scale of the phenomenon and the complex...
Published in Izvestiya, Physics of the Solid Earth
An Erratum to this paper has been published: https://doi.org/10.1134/S1069351321120016
Published in Izvestiya, Physics of the Solid Earth
Abstract—Modeling the relative motion of large crustal blocks vitally depends on an adequate description of the forces acting between the blocks. To describe motion at high strain rates, it proved necessary to assume a dry friction to depend on the shear strain rate and, in some cases, on the amplitude of fault side displacement. The best known exa...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Granular media determine the dynamics of many natural systems including faults in the Earth’s crust. The paper addresses the laboratory study of shear deformation of a model fault simulated by a layer of granular material located between rock blocks. A model fault is a complex dynamic system characterized by the presence of bifurcations an...
