Just before a sunspot forms on the photosphere,we will often see at that location:

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Plages are bright regions in the chromosphere that typically appear before the formation of sunspots on the photosphere. They are characterized by increased magnetic activity, which can indicate the formation of a sunspot. Filaments, prominences, and solar flares are not typically associated with the formation of sunspots on the photosphere.

Just Before a Sunspot Forms on the Photosphere,we Will Often