A5027979591- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Seismology and Earthquake Studies
- Geotechnical and Geomechanical Engineering
- Seismic Imaging and Inversion Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Seismic Waves and Analysis
- Rock Mechanics and Modeling
- Geological and Geochemical Analysis
- Mineral Processing and Grinding
- Thermography and Photoacoustic Techniques
- High-pressure geophysics and materials
- Geological Studies and Exploration
- Geological Modeling and Analysis
- Geomagnetism and Paleomagnetism Studies
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
Université Grenoble Alpes
2023-2025
Institut des Sciences de la Terre
2023-2025
Centre National de la Recherche Scientifique
2023-2025
Schmidt Institute of Physics of the Earth
2021-2024
Université Gustave Eiffel
2024
Institut de Recherche pour le Développement
2024
Lomonosov Moscow State University
2018-2022
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...
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...
We propose an approach that is aimed to enrich the catalogs of acoustic emission events recorded in laboratory experiments with such parameters as seismic moment and corner frequency. Because difficulty separation direct waves in performed on small samples, we use coda are composed reverberation of field tested sample. After multiple reverberations, resulting wavefield can be approximated nearly homogeneously distributed over sample and with signal...
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...
<p>We propose a coda-based estimation of source parameters acoustic events recorded in laboratory experiments on rock deformation. Coda-waves are considered as the reverberation field tested sample. After multiple reverberations, resulting wavefield can be approximated nearly homogeneously distributed over sample and with signal amplitudes decaying exponentially time (linearly logarithmic scale). Within framework this model, frequency-dependent coda amplitude at any moment is...
<p>The issues concerning the relationship between two self-similarity parameters—the Gutenberg– Richter b- and Omori p-values—in aftershock sequences are explored. In laboratory experiments, under fracture initiation in rock by sharp jumps axial stress, a correlation p- b-values is revealed relaxation regimes similar to aftershocks. The observed experiments on water-saturated sandstone samples with preliminarily formed faults negative...
<p>We present the results of laboratory studies on fluid-initiated fracture in samples porous-fractured rocks that have been initially saturated with a pressure-injected fluid and then tested under increasing pressure rocks. The tests were conducted at Geophysical observatory “Borok” Schmidt Institute Physics Earth Russian Academy Sciences. is equipped electrohydraulic press INOVA-1000. experiments rock substantially different porosity. made Buffalo...