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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: The February 24, 2010 substorm: a refined view involving a pseudobreakup/expansive phase/poleward boundary intensification sequence

Fig. 4

THEMIS white light keograms from Gillam (bottom) and Rankin Inlet (top) overlain to show auroral motions in the station meridians, with Cluster IMF shown at top as in Fig. 1. Scales at the left indicate approximate geomagnetic latitude, and the labels GILL and RANK indicate the zenith at the respective stations. A vertical red barmarks 4:11 UT on the keogram for comparison to Fig. 6. A vertical orange linemarks the expansive phase onset time of 04:26:21 UT in both panels. A vertical white lineat ca. 4:17 UT is missing data in the keogram

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