دورية أكاديمية
An analytical solution to assess the SH seismoelectric response of the vadose zone
| العنوان: | An analytical solution to assess the SH seismoelectric response of the vadose zone |
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| المؤلفون: | Monachesi, Leonardo Bruno, Zyserman, Fabio Ivan, Jouniaux, L. |
| بيانات النشر: | Wiley Blackwell Publishing, Inc |
| المجموعة: | CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
| مصطلحات موضوعية: | ELECTRICAL PROPERTIES, HYDROGEOPHYSICS, PERMEABILITY AND POROSITY, WAVE PROPAGATION, https://purl.org/becyt/ford/1.5Test, https://purl.org/becyt/ford/1Test |
| الوصف: | We derive an analytical solution of the seismoelectric conversions generated in the vadose zone, when this region is crossed by a pure shear horizontal (SH) wave. Seismoelectric conversions are induced by electrokinetic effects linked to relative motions between fluid and porous media. The considered model assumes a 1D soil constituted by a single layer on top of a half-space in contact at the water table, and a shearing force located at the earth?s surface as the wave source. The water table is an interface expected to induce a seismoelectric interfacial response (IR). The top layer represents a porous rock in which porous space is partially saturated by water and air, while the half-space is completely saturated with water, representing the saturated zone. The analytical expressions for the coseismic fields and the interface responses, both electric and magnetic, are derived by solving Pride?s equations with proper boundary conditions. An approximate analytical expression of the solution is also obtained, which is very simple and applicable in a fairly broad set of situations. Hypothetical scenarios are proposed to study and analyse the dependence of the electromagnetic fields on various parameters of the medium. An analysis of the approximate solution is also made together with a comparison to the exact solution. The main result of the present analysis is that the amplitude of the interface response generated at the water table is found to be proportional to the jump in the electric current density, which in turn depends on the saturation contrast, poro-mechanical and electrical properties of the medium and on the amplitude of the solid displacement produced by the source. This result is in agreement with the one numerically obtained by the authors, which has been published in a recent work. We also predict the existence of an interface response located at the surface, and that the electric interface response is several orders of magnitude bigger than the electric coseismic field, whereas it is the opposite ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0956-540X |
| العلاقة: | info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/gji/article-abstract/213/3/1999/4939267?redirectedFrom=fulltextTest; http://hdl.handle.net/11336/86656Test; Monachesi, Leonardo Bruno; Zyserman, Fabio Ivan; Jouniaux, L.; An analytical solution to assess the SH seismoelectric response of the vadose zone; Wiley Blackwell Publishing, Inc; Geophysical Journal International; 213; 3; 6-2018; 1999-2019; CONICET Digital; CONICET |
| الإتاحة: | https://doi.org/10.1093/gji/ggy101Test http://hdl.handle.net/11336/86656Test |
| حقوق: | info:eu-repo/semantics/openAccess ; https://creativecommons.org/licenses/by-nc-sa/2.5/arTest/ |
| رقم الانضمام: | edsbas.4E6ECBF3 |
| قاعدة البيانات: | BASE |
| تدمد: | 0956540X |
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