Published in Izvestiya, Physics of the Solid Earth
AbstractSimultaneous inversion of P and S receiver functions and of dispersion curves of Rayleigh waves for 16 seismograph stations provides insight into structure beneath the Caucasus and the Caspian Basin up to a depth of 700 km. Crustal thickness of the Caucasus ranges from 30 to 50 km. An anomalously high velocity ratio of the P and S waves (2....
Published in Izvestiya, Physics of the Solid Earth
The possibility of jointly inverting the receiver function waveforms and the seismic noise horizontal-to-vertical spectral ratio to study the Earth’s structure is substantiated. Both data types are widely used for constructing a velocity model beneath a single seismic station. The main difference between the methods is associated with the different...
Published in Izvestiya, Physics of the Solid Earth
Abstract—The three-dimensional (3D) interpretation of magnetotelluric (MT) data in the Koryak–Kamchatka region with interactive fitting of 3D model MT curves and magnetovariational matrices to their measured analogs is used to construct geoelectric sections of the upper part of the lithosphere. Based on the obtained sections, aqueous fluid fraction...
Published in Izvestiya, Physics of the Solid Earth
Abstract—A review is presented of the state-of-the-art publications concerning the nucleation and evolution of fault slip in the Earth’s crust. The review covers various aspects of the problem, from the structure of the slip localization zones to the triggering of dynamic rupture by exogenous factors. The publications show a clear current trend fro...
Published in Izvestiya, Physics of the Solid Earth
Abstract—We study an ancient earthquake that significantly damaged the Hansaray (Khansarai) in Bakhchysarai, Crimea, at the end of the 17th century. However, to date, the traces of this catastrophic event can barely be found in the Khansarai walls. Our studies have shown that this is mainly due to the numerous repairs and restorations which have be...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Analytical approximations are constructed and spectral analysis carried out for the profile data on terrain elevations obtained from global navigation satellite systems (GNSS). The results of calculations using the developed computer technologies within structural-parametric approach of the method of linear integral representations are pre...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Perhaps for the first time, we obtained the distributed volume electric currents determined by the observed geomagnetic dipole. To do that, using the Maxwell’s equations and well-established geodynamo estimates, we have shown that the mean current density in the Earth’s liquid core is several orders of magnitude higher than in the solid co...
Published in Izvestiya, Physics of the Solid Earth
Abstract—The stress-strain state before the М = 7.1 Ridgecrest earthquake in Southern California is analyzed based on spatiotemporal distribution of shear strains calculated in the geomechanical model within local ~100 × 100 km crustal segments at a depth of 3–7 km. In the epicentral zone of the earthquake, starting from three years before the even...
Published in Izvestiya, Physics of the Solid Earth
Abstract—Variations in the vertical electric field and atmospheric current in the near-surface atmosphere, accompanying strong earthquakes, are analyzed. The analysis is based on the data of the Center for Geophysical Monitoring in Moscow (CGM) and Geophysical observatory “Mikhnevo” of the Sadovsky Institute of Geosphere Dynamics of Russian Academy...
Published in Izvestiya, Physics of the Solid Earth
Abstract—A devastating earthquake with magnitude Mw = 7.2 occurred in the Van region, Eastern Turkey, on October 23, 2011. This study analyzes the characteristics of surface deformation before, during, and after the earthquake. The data from 300 × 300 km2 permanent GPS network are used to quantitatively estimate surface deformations in the epicentr...
