Electroseismic investigation of the shallow subsurface: Field measurements and numerical modeling

Михайлов, О. В.; Haartsen, Matthijs W.; Toksöz, M. Nafi

doi:10.1190/1.1444150

Cited by 131 publications

(101 citation statements)

References 16 publications

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“…[3][4][5][6][7] Furthermore, a wide range of field and laboratory validations of the coseismic field and the interface response was presented in the literature. [8][9][10][11][12][13][14][15][16][17][18][19][20][21] Several of these works compare either field measurements 15,17 or laboratory measurements 20 with a seismoelectric wave propagation model, corroborating that the coseismic and interface response fields are predicted by the theory.…”

Section: Introductionmentioning

confidence: 68%

Laboratory measurements and theoretical modeling of seismoelectric interface response and coseismic wave fields

Schakel

Smeulders

Slob

et al. 2011

Journal of Applied Physics

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A full-waveform seismoelectric numerical model incorporating the directivity pattern of a pressure source is developed. This model provides predictions of coseismic electric fields and the electromagnetic waves that originate from a fluid/porous-medium interface. An experimental setup in which coseismic electric fields and interface responses are measured is constructed. The seismoelectric origin of the signals is confirmed. The numerically predicted polarity reversal of the interfacial signal and seismoelectric effects due to multiple scattering are detected in the measurements. Both the simulated coseismic electric fields and the electromagnetic waves originating from interfaces agree with the measurements in terms of travel times, waveform, polarity, amplitude, and spatial amplitude decay, demonstrating that seismoelectric effects are comprehensively described by theory.

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Section: Introductionmentioning

confidence: 68%

Laboratory measurements and theoretical modeling of seismoelectric interface response and coseismic wave fields

Schakel

Smeulders

Slob

et al. 2011

Journal of Applied Physics

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show abstract

“…from the ordinary coseismic variation moving with the seismic wave as recorded and studied so far [9,10,12,[14][15][16][17][18][19][20][21][22][23]. This is the first report of the detection of this kind of electric variation, that is, correlation with the seismic wave starting from the beginning of fault rupture, in our long history of electric field measurement by using a borehole antenna.…”

Section: Coseismic Changesmentioning

confidence: 91%

“…At the first stage of the analysis of the phenomenon, the B anomalies (Figure 2(a)) at Hasaki were thought to be well-known coseismic electric variations observed and reported in numerous papers [9,10,12,[14][15][16][17][18][19][20][21][22][23]. They correlated in general with the ground surface fluctuation Figure 1).…”

Section: Coseismic Changesmentioning

confidence: 95%

“…The detection sensor is a special antenna made of a vertical casing pipe in boreholes of depths ranging 100 ∼ 1, 800 m [20,21]. The observation frequency bandwidth is DC (0-0.7 Hz), ULF (0.01-0.7 Hz), and ELF/VLF (1-9 kHz).…”

Section: Observation Methodsmentioning

confidence: 99%

“…The seismic wave speed is about 6 km/s for the primary (P) wave and 3.5 km/s for the secondary wave [1,2] in the upper crust. There have been many reports on the electromagnetic phenomena of earthquakes and volcanic eruptions (e.g., [3][4][5][6][7]), but only a few papers have dealt with the field observation of electromagnetic variation that started just after the rupture of the fault [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Belov et al [8] detected associated electromagnetic fields about 10 seconds before the seismic wave arrival and 4 seconds after the origin time.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Remote Detection of the Electric Field Change Induced at the Seismic Wave Front from the Start of Fault Rupturing

Fujinawa¹,

Takahashi²,

Noda³

et al. 2011

International Journal of Geophysics

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Seismic waves are generally observed through the measurement of undulating elastic ground motion. We report the remote detection of the Earth's electric field variations almost simultaneously with the start of fault rupturing at about 100 km from the fault region using a special electric measurement. The rare but repeated detection indicates that the phenomenon is real. The characteristic time of diffusion is almost instantaneous, that is, less than 1 second to travel 100 km, more than ten times faster than ordinary seismic P wave propagation. We suggest that the measured electric field changes are produced by the electrokinetic effect through increased pore water pressure of the seismic pulse. It is also suggested that the long range propagation is due to the surface wave mode confined near the interface of the different conductivity. The length scale of the finite strength of the electric field is 16 km, 160 km for electric conductivity of 0.01, 0.001, Sm −1 , respectively. This phenomenon suggests a new seismic sensing method and a new earthquake early warning system providing more seconds of lead time.

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Comparison of full and quasi‐static seismoelectric analytically based modeling

Gao

Huang

2017

JGR Solid Earth

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Quasi‐static electromagnetic (EM) approximation was frequently used in numerical modeling of the seismoelectric wavefields, but the computational error it brings is unclear. In this study, we investigate the error caused by the quasi‐static EM approximation based on a horizontally layered model. With such an approximation we obtain a simplified set of Pride's equations and present an analytically based algorithm to solve the seismoelectric responses to an explosive source. First, we solve the seismic wavefields by ignoring the influence of the converted EM fields on the propagation of the seismic waves. Second, we simplify Maxwell equations to a Poisson equation of the electric potential, from which the EM signals are solved. The solved EM signals are compared with the solutions solved from the full Pride's equations to investigate the error caused by the quasi‐static EM approximation. The result shows that the quasi‐static EM approximation causes the loss of the electric field accompanying the S waves and yields errors in modeling the coseismic magnetic fields accompanying the S waves. The errors tend to become smaller when increasing the frequency and decreasing the salinity, implying that the quasi‐static EM approximation seems to be more suitable for simulating the coseismic EM signals under high‐frequency and low‐salinity conditions. The quasi‐static EM approximation also affects the simulation of the interfacial EM waves. Only under the condition that the wavelength of the EM wave is much larger than the source‐receiver distance, the quasi‐static method is valid in simulating the EM wave.

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Electroseismic investigation of the shallow subsurface: Field measurements and numerical modeling

Cited by 131 publications

References 16 publications

Laboratory measurements and theoretical modeling of seismoelectric interface response and coseismic wave fields

Laboratory measurements and theoretical modeling of seismoelectric interface response and coseismic wave fields

Remote Detection of the Electric Field Change Induced at the Seismic Wave Front from the Start of Fault Rupturing

Comparison of full and quasi‐static seismoelectric analytically based modeling

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