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Fig. 2 | Earth, Planets and Space

Fig. 2

From: Volcanic activity on Io and its influence on the dynamics of the Jovian magnetosphere observed by EXCEED/Hisaki in 2015

Fig. 2

a A typical EUV spectrum (53–147 nm) measured by the Hisaki spacecraft before the volcanic eruption. The spectrograph mixes spatial and spectral information on the X-axis, whereas the spatial information on the equatorial plane is represented on the Y-axis. Three types of origins are observed: Jupiter’s aurora, IPT, and geocorona. b The slit shape of Hisaki and its position relative to Jupiter. The uniquely shaped slit is superimposed on the real, visible image of Jupiter taken by the Field-of-View guidance camera on Hisaki. The white arc represents the Io orbit at 6 R J. The two green lines are Jovian magnetic field lines that reach the Io orbit

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