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Two substorms occurred at ∼04:05 and ∼04:55 UT on February 26, 2008 are studied with the in-situ observations of THEMIS satellites and ground-based aurora and magnetic field measurements. Angelopoulos et al. have made a comprehensive study of the 04:55 UT event. We showed detailed features of the two substorms with much attention to the first event and to the relationship between mid-tail magnetic...
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