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Fig. 3

image

The photospheric magnetic field synoptic map with coronal magnetic field lines derived from the PFSS model at the times of the 3He ions flux increases. The green and red lines represent the positive and negative polarity open field lines that intersect the source surface at latitudes and ± 7°. Field lines that are open at the ecliptic are shown by lines and other regions of open field are denoted as crosses. The color bars above indicate the interplanetary magnetic field polarity. The yellow and blue diamonds show the footpoint of Earth and STA on the source surface, respectively. We note that the data source of the map is based on HMI magnetograms (grey scale) and the time runs from right to left in the map. ARs are labeled with the last three digits of their names e.g., AR11124 is marked at 124.

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