Fig. 2.
From: Long-term behavior of annual and semi-annual Sq variations
SQ(YEAR,DOY) for the selected days during 1952–2007. See Section 2 for data selection.
Fig. 2. | Earth, Planets and Space
From: Long-term behavior of annual and semi-annual Sq variations
SQ(YEAR,DOY) for the selected days during 1952–2007. See Section 2 for data selection.