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Solar activity from 8 Sept H-alpha and CaK


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The correlation between activity in H-alpha and CaK is fascinating to observe.
I suppose, if the such alignment were possible, one could "mouse-over" between them. <G> Having recently had to sell my PST <sigh> maybe, next time, a CaK version. It's like White Light, only more so... :) Edited by Macavity
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