A5075559667- Geotechnical and Geomechanical Engineering
- Earthquake Detection and Analysis
- earthquake and tectonic studies
- Rock Mechanics and Modeling
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Drilling and Well Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Mineral Processing and Grinding
- Seismic Waves and Analysis
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Granular flow and fluidized beds
- Mining and Gasification Technologies
- Geological Modeling and Analysis
- Thermography and Photoacoustic Techniques
- Force Microscopy Techniques and Applications
- Methane Hydrates and Related Phenomena
- Industrial Engineering and Technologies
- Geomagnetism and Paleomagnetism Studies
- Underwater Acoustics Research
- Engineering Diagnostics and Reliability
- Aerogels and thermal insulation
- Building materials and conservation
- Electromagnetic Effects on Materials
Geophysical Survey
2010-2024
Schmidt Institute of Physics of the Earth
2016-2023
Russian Academy of Sciences
2010-2014
Shared Research Facilities "Petrophysics, Geomechanics and Paleomagnetism", created based on actively developing divisions of the Schmidt Institute Physics Earth RAS, has advanced research equipment unique methods, which determines possibility solving a wide range applied fundamental problems in sciences. The main activities Paleomagnetism" are field geomechanical modelling petrophysics, paleomagnetism, rock magnetism analytical studies composition structure minerals, rocks materials....
Abstract —The analysis of the local earthquake catalog revealed fine features in behavior seasonal components induced seismicity Koyna–Warna region, western India. The variations associated with annual fluctuations water levels Koyna and Warna reservoirs have maxima during year, corresponding to known mechanisms immediate delayed responses reservoir-triggered (RTS). superposed epoch combined stochastic modeling random catalogs regular changes b -value frequency–magnitude relationship...
Laboratory experiments on studying the aftershock regime are carried out with sandstone specimens under different axial loading and uniform compression constant pore pressure. The sequences modeled by scenario of stepwise increasing a specimen strain control ensuring regular generation sequences. conducted intact preliminarily formed shear macrofractures simulating natural faults. were multichannel recording acoustic emission (AE) signals which made it possible to locate AE sources. Several...
Abstract We develop a method to estimate relative seismic moments M 0 and corner frequencies f c of acoustic emission events recorded in laboratory experiments from amplitude spectra signal's coda composed reverberated scattered waves. This approach has several advantages with respect estimations direct waves that are often clipped also difficult separate performed on small samples. Also, inversion the does not require information about source locations mechanisms. use developed analyze data...
Application of three-component recording transducers for laboratory investiga- tions was restrained a long time because the manufacturing complexity. Ingenious piezoelectric were used in this work acoustic emission signals. At same these made it possible to reproduce wave pattern which occurs sample. A real medium, oil-water-saturated reservoir zones especially, is complicated and diverse from point view lithologic composition, porosity nature, graininess presence various inclusions....
We develop a method to estimate relative seismic moments M0 and corner frequencies fc of acoustic emission events recorded in laboratory experiments from amplitude spectra signal’s coda composed reverberated scattered waves. This approach has several advantages with respect estimations direct waves that are often clipped also difficult separate performed on small samples. Also, inversion the does not require information about source locations ans mechanisms. use developed analyze data two...
Using a mathematical statistics approach, we review the procedure for type classification of acoustic emission (AE) events into shear, tension, and collapse, proposed by Zang et al. (1998). The is based on counting signs first pulses waves arriving at sensors widely used in rock physics experiments. Under assumption that determination errors first-pulse have uniform independent distribution, statistical significance power separation test are evaluated given number used. We consider compare...