New interpretation of the reduction phenomenon in the electrical resistivity of rock masses before local earthquakes
| Autor: | Pavel Barsukov, E. B. Fainberg |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Physics and Astronomy (miscellaneous) Astronomy and Astrophysics Massif 010502 geochemistry & geophysics 01 natural sciences Interpretation (model theory) Depth sounding Geophysics Space and Planetary Science Ridge Electrical resistivity and conductivity Tension (geology) Compression (geology) Reduction (mathematics) Geology Seismology 0105 earth and related environmental sciences |
| Zdroj: | Physics of the Earth and Planetary Interiors. 294:106279 |
| ISSN: | 0031-9201 |
| DOI: | 10.1016/j.pepi.2019.106279 |
| Popis: | Based on long-term observational data from the area of Peter the Great Ridge (Pamir), a decrease in the electrical resistivity of the rock massif before local earthquakes has been observed. To explain the observed phenomenon, a hypothesis has been proposed: the structure of the pore space of a rock in the focal zone of an earthquake changes during the compression/tension associated with earthquake preparation. However, the models proposed have only qualitatively interpreted the experimental data. This article attempts to quantify this hypothesis based on 3D modeling of the observed electromagnetic effects. It is shown that variations in the apparent resistivity are due to changes in the electrical resistivity in a narrow fault zone located at the focus of the dipole-dipole sounding system. The changes occur at depths of |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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