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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Proton auroras during the transitional stage of substorm onset

Fig. 1

THEMIS ASI images showing substorm onset on 2011-10-02. A few selected THEMIS ASI images showing the substorm onset on 2011-10-02. The images are mapped in AACGM coordinate by assuming an emission height of 110 km. A blue line in each figure marks the MSP scan line. A white asterisk marks the zenith of the ASI. The images are indexed to facilitate referene in the text

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