Is that variation by month due to a specific reason? How it bands together at certain latitudes?
this post was submitted on 11 Feb 2026
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Its part of the 11 year solar cycle. The bands move from the poles to the equator in during the cycle.
Edit: If your really interested: https://www.youtube.com/watch?v=fpNBIqjt_-4

Sunspot? I'll go blind!