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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Influence of geomagnetic storms on the quality of magnetotelluric impedance

Fig. 3

Variations in the Hx component of site 163 and the Dst index. a Shows the variation in the Hx component. b Shows the first derivative of the Hx component. c Shows the variation in the Dst index. d Shows the first derivative of the Dst index's absolute value; the red dashed line denotes 1.5σ (σ is the standard deviation). The horizontal axis denotes the time in UTC. The shadow in red represents the data in the storm period

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