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

Fig. 1

From: Penetration of the electric fields of the geomagnetic sudden commencement over the globe as observed with the HF Doppler sounders and magnetometers

Fig. 1

Solar wind flow pressure (top left) and electric field (top right) at the magnetopause (from the OMNI provided by NASA), and geomagnetic SYM-H (bottom left), AL and AU (bottom right) indices as derived from the ground magnetometer data (from WDC for Geomagnetism, Kyoto) during the geomagnetic sudden commencement on 17 March, 2015

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