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Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

From: Relationship between the low-latitude coronal hole area, solar wind velocity, and geomagnetic activity during solar cycles 23 and 24

Fig. 7

Variation of the average CH area in the middle- to low-latitude regions with the data of every 2 years during solar cycle 23 (left panel) and 24 (right panel). The vertical light blue line represents the start time of an enhancement of solar wind velocity around the Earth’s orbit. Red lines in both panels indicate the variation of the period of the solar maximum, from 2000 to 2001 (the left panel) and from 2013 to 2014 (the right panel)

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