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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Spectral peaks in electric field at resonance frequencies for seismically excited motion of ions in the Earth’s magnetic field

Fig. 3

(a) Ground velocity record of an artificial earthquake during a blasting experiment and (b) electric field record, corresponding to the ground velocity. E x and E y denote the northward and the eastward components of electric field, respectively. (c) Absolute values of transfer function derived from the observed ground velocity and the observed electric field.

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