SH Seismoelectric Response of a Glacier: An Analytic Study

Autor: Fabio I. Zyserman, Laurence Jouniaux, Leonardo Bruno Monachesi
Přispěvatelé: Facultad de Ciencias Astronómicas y Geofísicas [La Plata] (FCAGLP), Universidad Nacional de la Plata [Argentine] (UNLP), Géophysique expérimentale (IPGS) (IPGS-GE), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), PICS SEISMOFLUID CNRS/CONICET France/Argentine
Jazyk: angličtina
Rok vydání: 2018
Předmět:
glacier
010504 meteorology & atmospheric sciences
Analytic Study
SH Seismoelectric
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]
ELECTRICAL PROPERTIES
010502 geochemistry & geophysics
01 natural sciences
Ciencias de la Tierra y relacionadas con el Medio Ambiente
Physics::Geophysics
purl.org/becyt/ford/1 [https]
purl.org/becyt/ford/1.5 [https]
GLACIERS
Ciencias Naturales
Glacier
Ciencias Exactas y Naturales
Geomorphology
Physics::Atmospheric and Oceanic Physics
Ciencias Exactas
0105 earth and related environmental sciences
Earth-Surface Processes
geography
Wave propagation
geography.geographical_feature_category
Geoquímica y Geofísica
Geofísica
seismoelectric
Geophysics
13. Climate action
WAVE PROPAGATION
Electrical properties
SEISMOELECTRICS
Geoquímica
Seismoelectrics
Glaciers
CIENCIAS NATURALES Y EXACTAS
Geology
Zdroj: Journal of Geophysical Research: Earth Surface
Journal of Geophysical Research: Earth Surface, American Geophysical Union/Wiley, 2018, 123 (9), pp.2135-2156. ⟨10.1029/2018JF004607⟩
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
RID-UNRN (UNRN)
Universidad Nacional de Río Negro
instacron:UNRN
ISSN: 2169-9003
2169-9011
DOI: 10.1029/2018JF004607⟩
Popis: In this work we derive the analytic solutions to the system of equations modeling, within the framework of Pride's theory, the seismic-to-electromagnetic conversions taking place in a glacial environment. Considering a one-dimensional approach, we set a pure shear horizontal wave seismic source on top of an elastic medium representing the glacier, which overlies a porous medium fully saturated with water, representing the glacier bed. The obtained solutions allow to separately represent and analyze the induced electromagnetic responses, the so called coseismic waves, for both the electric and magnetic fields along with the signals originated at the glacier bottom, the electric interface response, and magnetic interface response. We also propose approximate solutions, useful to be used in a fast inversion algorithm. We analyze the characteristics of the induced electromagnetic signals and their dependence on the type of glacier bed, considering an unconsolidated one and a consolidated one. The main results of the present paper are manifold, on the one hand, the mentioned analytic solutions, on the other hand, that the electric interface response originated at the glacier bottom is proportional to the electric current density at this depth, and depends on textural and electrical properties of the basement. We also showed that the amplitude of the electric interface response is three orders of magnitude higher than the amplitude of the electric coseismic field. This fact reinforces the idea proposed in our previous works that it would be interesting to test shear horizontal seismoelectrics as a possible geophysical prospecting and monitoring tool.
Facultad de Ciencias Astronómicas y Geofísicas
Databáze: OpenAIRE
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