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Fig. 2.


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Solar wind dynamic pressure and interplanetary magnetic field (Z component in GSM coordinates) measured by Wind spacecraft, SYM-H and AE indices measured at ground. Dashed lines mark an area that we can relate from Wind to ground that corresponds to an enhancement of Pd and SYM-H, the delay is due to their different locations. Dash-dotted line marks when Bz becomes negative suddenly and then the main phase of the magnetic storm starts, AE suddenly increases.

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