Mathematical Modeling in Geophysics, № 3, 1998

A new method for seismological investigation of the Earth's crust and the upper mantle, geodynamic processes and earthquake preparation zones has been developed using powerful vibrational sources of seismic waves. Since nuclear explosions have been prohibited, this method remains the only active method for deep seismic sounding of the Earth...

Efficiency of systems for monitoring of nuclear tests within the Comprehensive Test Ban Treaty (CTBT) essentially depends on accuracy in the determination of time, geographical coordinates, depth and power of explosions in accordance with the data for seismic waves recorded by seismologic stations. The purpose of the present project is...

The paper considers the results of the 1995 Russian--Japanese experiment, in which the structure of vibroseismic fields of powerful sources, as well as the relation between these fields and the tensely deformed state of the geological medium were investigated.

The raise of efficiency for information process engineerings is an actual problem. In the paper, the effective algorithm of digital handling of signals is presented. The given algorithm can be used in many applications of the spectral analysis.

The present paper is dedicated to the construction of an allocated system designed to perform vibroseismic monitoring of earthquake prone zones.

The main problem is associated with the creation of a distributed computer system providing collection, accumulation and processing of the observational data at an area of several thousands of...

The phenomenon of intensive acoustic wave excitation by surface explosion sources is known in seismology and seismic prospecting geophysics. The sound impulse from explosion propagating along the Earth's surface induces elastic surface waves. They are recorded on seismograms with arrival times equal to the travel time of acoustic wave from...

A specific character of "the wave arrival time" concept with reference to seismorecords taken from a vibrating source is considered. The arrival time is defined as the envelope maximum on the grouped waves of the corresponding convolution. The accuracy of estimation of the envelope maximum depending on the degree of...

The recently developed method of active vibroseismic monitoring is based on the sounding of a geological structure by seismic waves from artificial controlled sources-vibrators. Thus, the changes occurring in the tensely-deformed state of a medium are considered as related to changes of information parameters of wave fields that are established...

The given work is aimed at the analysis of features of spectral-temporal functions (STF), describing vibrational seismograms from powerful vibrators in the near and far zones. The spectral characteristics of P- and S-waves in a far zone at distances of 50, 320, 355 km have been analyzed. The phenomenon of...

The paper is devoted to modeling of the acoustoseismic induction process caused by the interaction of a harmonic wave with elastic half-space. This effect was first detected in experiments with powerful vibrational sources of seismic waves, carried out at the vibroseismic test site of Siberian Branch of RAS. The 2D...

The method of\/ active vibroseismic monitoring being developed recently suggests geological medium probing by seismic waves from artificial controlled sources. Here the changes happening in the stress-deformed state of the medium and its rheologic characteristics are determined by changes in the information parameters of seismograms, i.e., by changes in the...

In the article, there resumed the results of polarization treatment of seismic fields from various types of powerful vibrators depending on temperature of surrounding air. Peculiarities of P- and S-waves in these conditions have been studied.

The main aspects of the complex amplitude method were developed for analyzing the modulated oscillations in radio engineering systems. Such signals representing the oscillations of the carrier frequency ω0 modulated by a relatively low-frequency signal Ωmax are characterized by the relationship Ωmax ≪ ω0. Most generally...

The present work deals with the problems connected with precision of measurements of vibroseismic signals and techniques of setting-up an amplification factor of the seismometric channel.

We present some definitions of the percentile filter and the weighted-order statistics. Then we offer the probability interpretation of the weighted-order statistics and the definition of the percentile filter for this case. To conclude, we give some examples of data processing, characteristic of some fields of geophysics.