Migration of ALs in units of degrees in the Carrington reference frame in the north (top) and south (bottom) in 2004. Black dots stand for B-flares, triangles for C-flares, red dots for M-flares, and stars for X-flares. The two solid lines depict the migration of the two ALs from the beginning to the end of 2004 with 45° extensions on each side denoted by dotted lines.
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