Piezoelectric effects in quartz-rich rocks

Bishop, John

doi:10.1016/0040-1951(81)90268-7

Cited by 54 publications

(37 citation statements)

References 13 publications

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“…Usually, quartz grains are randomly oriented and show very weak piezolectricity in the aggregate. But because of residual orientation of the quartz grains some rocks will show a larger piezolectric effect [Ghomshei and Templeton, 1989], although still perhaps two to three orders of magnitude less than in monocrystalline quartz [Bishop, 1981]. The piezolectric properties of rocks have been widely studied in the context of geophysical prospecting [Kepis et al, 1995;Neyshtadt et al, 1972;Sobolev and Demin, 1980;Sobolev et al, 1984].…”

Section: B Piezoelectric Effectmentioning

confidence: 99%

Modeling of seismo-electromagnetic phenomena

Gershenzon¹,

Bambakidis²

2001

Russ. J. Earth Sci.

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Abstract.A model for seismo-electromagnetic (SEM) phenomena is described. The electromagnetic signals generated by mechanical disturbances in the earths crust have been calculated and compared with reported seismo-electromagnetic signals (SEMS). The major known SEM phenomena, namely, tectonomagnetic variations, electrotelluric anomalies, geomagnetic variations in the ultra-low frequency range and electromagnetic emission in the radio frequency range, have been considered. We have calculated the spectral densities associated with various types of sources. The set of formulas necessary to calculate the detected (filtered and averaged) electric and magnetic fields generated by mechanical disturbances for a wide range of frequencies and at various distances from the source are presented. Based on these formulas, we discuss the conditions under which electrokinetic, piezomagnetic and piezolectric effects could be responsible for SEMS. A comparison of estimated values of SEMS with reported field measurements leads to the conclusion that the sources of most anomalous SEMS are relatively close to the detector. In other words, the source of the signal is local, although the source of the mechanical disturbance which activates it, i.e. the epicenter of an earthquake, may be far away. Recommendations for field experiments (appropriate detector sitting, detector parameters and frequency range) following from the model developed here are presented.

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Section: B Piezoelectric Effectmentioning

confidence: 99%

Modeling of seismo-electromagnetic phenomena

Gershenzon¹,

Bambakidis²

2001

Russ. J. Earth Sci.

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“…We assume that the piezoelectric body has the symmetry class of ∞mm of the limiting group after experimental results by Parkhomenko (1971) and Bishop (1981b). The symmetry axis is assumed to be parallel to the z-axis.…”

Section: Modelmentioning

confidence: 99%

“…The ratios between elements are those for a quartz aggregate which consists of equal proportions of both enantiomorphs, and the aaxes of the two hands are antiparallel to each other, obtained theoretically by Bishop (1981a) and adopted for experimental studies by Ghomshei et al (1988) and Ghomshei and Templeton (1989). The absolute value of piezoelectric coefficients representing those of quartz-rich rocks in the crust, adopted and denoted above are by 3 orders of magnitude smaller than those for pure single-crystal quartz (Bishop, 1981b). The value is smaller by one order of magnitude than the value obtained by recent results of Ghomshei et al (1988).…”

Section: Modelmentioning

confidence: 99%

“…Experiments showed that some kinds of rocks containing piezoelectric crystals have bulk piezoelectricity (Parkhomenko, 1971;Bishop, 1981b). Though Tuck et al (1977) denied the presence of bulk piezoelectricity, recent experimental Copy right c The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences.…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetic signals related to incidence of a teleseismic body wave into a subsurface piezoelectric body

Ogawa

Utada

2014

Earth Planet Sp

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This paper presents a case study of Electromagnetic (EM) signals associated with earthquakes due to the piezoelectricity of crustal rocks. For a simple model of crustal structure with a subsurface piezoelectric body, a mathematical expression was obtained that describes the behavior of piezoelectric EM signals due to incidence of a teleseismic body wave. Using this expression, we evaluated expected EM signals with physical parameters reasonable for crustal rocks. Results of the frequency domain analysis suggested that the intensity of the signal decreases with decreasing frequency due to decreasing stress rate at lower frequencies, and decreases with increasing frequency due to EM attenuation in the conducting medium at higher frequencies. However, the latter (the skin effect) was shown to be negligible at the dominant frequency range of seismic waves so far as a shallower piezoelectric body is concerned. Numerical results also indicated a resonant feature of the piezoelectric EM signals corresponding to geometry of the subsurface piezoelectric body. However, numerical calculations suggested that such signals cannot be detected except for strong motions. If detected, on the other hand, their spatial and frequency characteristics will provide information on the geometry of the subsurface piezoelectric body.

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“…The latter are generated as streaming potentials when saline water moving through porous rocks entrains ionic charges (Draganov et al, 1991;Bernabé, 1998) or when stress is applied to rocks containing (or not) piezoelectric minerals such as quartz (Bishop, 1981;Varotsos et al, 1997;Freund, 2002;Stavrakas et al, 2003). The transmission of substantial stress over large distances has been debated (Geller, 1996;Sgrigna et al, 2002a;Sgrigna and Malvezzi, 2003).…”

Section: Ground and Space Short-term Seismic-associated Eme Signalsmentioning

confidence: 99%

The ESPERIA satellite project for detecting seismo-associated effects in the topside ionosphere. First instrumental tests in space

et al. 2008

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In recent times, ionospheric and magnetospheric perturbations constituted by radiation belt particle precipitations, variations of temperature and density of ionic and electronic components of ionospheric plasma as well as electric and magnetic field fluctuations have been detected on board of the LEO satellites and associated with earthquake preparation and occurrence. Several mechanisms have been suggested as justifying the seismoelectromagnetic phenomena observed in the upper lithosphere and in the topside ionosphere before, during and after an earthquake. Their propagation in these media has also been investigated, but physical knowledge of such processes is below standard. Consequently, coordinated space and ground-based observations based on data gathered simultaneously in space and at the Earth's surface are needed to investigate seismo-associated phenomena. To this end, the ESPERIA space mission project has been designed for the Italian Space Agency (ASI). To date, a few instruments of its payload have been built and tested in space. This paper reports on the justification, science background, and characteristics of the ESPERIA mission project as well as the description and testing of ESPERIA Instruments (ARINA and LAZIO-EGLE) in space.

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Piezoelectric effects in quartz-rich rocks

Cited by 54 publications

References 13 publications

Modeling of seismo-electromagnetic phenomena

Modeling of seismo-electromagnetic phenomena

Electromagnetic signals related to incidence of a teleseismic body wave into a subsurface piezoelectric body

The ESPERIA satellite project for detecting seismo-associated effects in the topside ionosphere. First instrumental tests in space

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