Seismoacoustic responses to high-power electric pulses from well logging data at the Bishkek geodynamical test area

Zakupin, A.S.; Богомолов, Л. М.; Mubassarova, V. A.; Il’ichev, P. V.

doi:10.1134/s1069351314040193

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Low-frequency geoacoustic signals were recorded by an acoustic measuring complex [1], which was developed at the Scientific Station RAS (Bishkek, Kyrgyzstan) and provided by IMGG FEB RAS within joint investigations. The measuring complex consists of two connected parts, they are: the remote and the main ones.…”

Section: Recording Instrumentation and Methodsmentioning

confidence: 99%

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Joint analysis of low-frequency geoacoustic and deformation signals

et al. 2018

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Section: Recording Instrumentation and Methodsmentioning

confidence: 99%

“…Bock scheme of the acoustic measurement complex. ADC -analog-to-digital conversion block, PC -personal computer[1].…”

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confidence: 99%

Joint analysis of low-frequency geoacoustic and deformation signals

et al. 2018

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“…To record the seismoacoustic emission signals, we apply a measuring system (Zakupin et al, 2014), which was developed and constructed at Research Station of the Russian Academy of Sciences. The system was upgraded to apply it on the ground surface and presented to IKIR FEB RAS within joint investigations.…”

Section: Instrumentation and Datamentioning

confidence: 99%

Fractal analysis of seismoacoustic signals of near-surface sedimentary rocks in Kamchatka

Imashev

Mishchenko

2020

Geofizika (Online)

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We studied, by the mono-and multifractal detrended fluctuation analysis (DFA), time fluctuations in the dynamics of seismoacoustic data, recorded in Karymshina site, which is located in a seismic area of Kamchatka. We took a series of seismoacoustic responses to the regional seismic events with the magnitudes M > 4 for the period 2017-2018. The series was divided into three groups (high, medium and low) based on the amplitude of recorded seismoacoustic response. Background noise segments of the signals demonstrated monofractal behavior similar to white noise by almost constant values of generalized Hurst exponent H q ≈0.5 and very small width of the multifractal spectrum Δa ≈ 0.1. Analysis of the high amplitude seismoacoustic signals with clear P-, S-and coda waves showed that P-and S-waves demonstrate wider multifractal spectrum (Δa P = 0.37, Δa S = 0.35) and range of generalized Hurst exponents H q in comparison with coda wave, characterized by almost constant H q and minimal width of multifractal spectrum (Δa CODA = 0.13). We showed that the properties of the multifractal spectrum could be used in detection of seismic wave arrival, estimation its duration and separation of P-, S-and coda waves. Application of the monofractal DFA in a sliding window showed that the acoustic signal transits from monofractal and uncorrelated background noise (Hurst exponent equals to 0.5) into the long-range dependent state during seismic waves arrival, that is helpful in analysis of the signals, particularly in case of low amplitude acoustic responses, usually demonstrating an unclear waveform. Difference in multifractal spectrum width between the original low amplitude signal and its surrogates, obtained by random shuffling showed that the multifractality in the signal is dominantly due to long-range correlations.

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“…It was shown that in microseism spectra there are thin peaks corresponding to monochromatic signals. Such peaks were ubiquitous [24][25][26][27][28][29][30], even at the ocean bottom [31]. Researchers were revealed their main properties such as small variations in main frequencies and their harmonics over time, correlated with variations in the frequency of the electrical network.…”

Section: Introductionmentioning

confidence: 99%

The earth-fill dam state express investigation using mechanical vibrations produced by HPP

Antonovskaya

Kapustyan

2022

Frattura Ed Integrità Strutturale

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The usage of mechanical vibrations produced by the hydropower plant (HPP) turbine may be used for seismic sounding of large-scale constructions as the earth-fill dam and its abutment contacts. Such vibrations are monochromatic oscillations on main frequencies and their harmonics produced by turbine. Seismic sensors installed on the dam's crest and inside it, if it possible, and in the area of abutment contacts register microseisms include HPP turbine operation vibrations which may be extracted by seismic data processing, i.e., filtering. We discuss two data processing possibilities: symphonious filter as the hardware one and power spectrum calculation as digital one. We consider the two case of earth-fill dams state investigations. There are the Chiryurt HPP dam (Republic of Dagestan, Russia, 9.5 m high) and the Nurek HPP dam (Tajikistan, 300 m high). We show the possibilities of seismic express investigations using signals of main frequencies produced by HPP turbine for dam sounding. For Chiryurt dam the extra fluid filtering in the central part of the dam was revealed. Nurek dam abutment contact monitoring showed the temporal variation of its stress-strain state associated with deformation variation 10-5-10-6 presumably due to regional seismicity.

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Seismoacoustic responses to high-power electric pulses from well logging data at the Bishkek geodynamical test area

Cited by 5 publications

References 2 publications

Joint analysis of low-frequency geoacoustic and deformation signals

Joint analysis of low-frequency geoacoustic and deformation signals

Fractal analysis of seismoacoustic signals of near-surface sedimentary rocks in Kamchatka

The earth-fill dam state express investigation using mechanical vibrations produced by HPP

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