Spichak, V. V.
Published in
Izvestiya, Physics of the Solid Earth
Various hypotheses of the geoelectric structure of the Transcaucasian region reflecting a priori geological and geophysical information and data from profile magnetotelluric (MT) soundings are analyzed. These hypotheses are used to construct simplified 3-D models of electrical conductivity differing in the patterns of the shallow and deep structure...
Antsiferov, A. V. Kompanets, A. I. Tirkel, M. G.
Published in
Izvestiya, Physics of the Solid Earth
The seismoacoustic method of transmitted waves (seismic sounding) is applied to study the tectonic structure of a rock mass between a tunnel and the Earth’s surface and to determine seismic characteristics of covering rocks suitable for tunnel site engineering.
Lukk, A. A. Deshcherevsky, A. V.
Published in
Izvestiya, Physics of the Solid Earth
On the basis of seismological and geological evidence, the aftereffect region of the strong Dzhirgatal earthquake is localized as a real physical object. The time dependence of the number of aftershocks of this earthquake is best described by a simple hyperbolic law (p = 1, or the Omori law), which is well consistent with the ideas of self-similari...
Arefiev, S. S. Rogozhin, E. A. Bykova, V. V. Dorbath, C.
Published in
Izvestiya, Physics of the Solid Earth
The Racha earthquake of 1991 was the strongest of the earthquakes recorded in the Caucasus. It was studied by an international epicentral expedition. Unique data gathered by this expedition included records of aftershocks whose swarm was very intense. A 3-D velocity model is obtained from analysis of these data by the method of local earthquake tom...
Pavlenko, O. V.
Published in
Izvestiya, Physics of the Solid Earth
Records of the Chi-Chi (Taiwan) earthquake of 1999 (Mw = 7.7) obtained at the Dahan vertical array (a part of the SMART-2 array) in NE Taiwan are analyzed. The Dahan array was located at a distance of ∼80 km from the fault plane of the earthquake. Using the method previously applied to the analysis of soil behavior during the Japan earthquakes in K...
Trubitsyn, V. P. Simakin, A. G. Baranov, A. A.
Published in
Izvestiya, Physics of the Solid Earth
According to an opinion widespread in the literature, high viscosity regions (HVRs) in the mantle always affect the structure of mantle flows, changing it in both the HVR itself and the entire mantle. Moreover, a simplified relation is often adopted according to which the flow velocity in the HVR decreases in inverse proportion to viscosity. Theref...
Levin, B. V. Pavlov, V. P.
Published in
Izvestiya, Physics of the Solid Earth
Antonov, V. A. Kondrat’ev, B. P.
Published in
Izvestiya, Physics of the Solid Earth
Kuzin, I. P. Solov’eva, O. N. Flenov, A. B.
Published in
Izvestiya, Physics of the Solid Earth
The presence of a phenomenological relationship between high velocity regions in the Benioff zone and sources of relatively strong earthquakes (M ≥ 6) was established for the first time from the comparison of such earthquakes with the velocity structure of central Kamchatka in the early 1970s. It was found that, in the region with P wave velocities...
Poltaratskaya, O. L. Fainberg, E. B. Singer, B. Sh.
Published in
Izvestiya, Physics of the Solid Earth
Analysis of magnetotelluric (MT) sounding studies in western Yakutia showed that amplitude curves are strongly affected by the regional distribution of electrical conductivity heterogeneities of the sedimentary cover, while phase curves are distorted to a lesser extent. The distribution of the longitudinal conductance in the sedimentary cover is co...
