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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

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

Fig. 1

Space and ground magnetic fields during the substorm event of February 24, 2010. The 4:00-5:30 UT period of interest is indicated with gray shading. The top panel shows OMNI propagated IMF northward component (green) and three components of the magnetic field measured by Cluster-1 just in front of the Earth’s bow shock. At the end of the period shown, Cluster detected foreshock waves. The middle panelgives Standard AL (black), standard AU (green), THEMIS AL (blue), Baker Lake (BLC) magnetic north component, and Nuuk (Greenland) magnetic north component of ground magnetic field. The bottom panelshows midlatitude eastward (red) and northward (black) magnetic field components at midlatitude ground stations from west (left) to east (right) in North America

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