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2003年2月12日,ACE卫星观测到IMFBz分量的4次快速反向:从稳定的北向(Bz～9nT)快速转为稳定的南向(Bz～-8nT);在持续南向约34min
On February 12, 2003, the ACE satellite observed four fast reversals of the IMFBz component: rapidly changing from a stable north (Bz ~ 9nT) to a stable south (Bz ~ -8nT); continuing southward for about 34 min