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#TerminatorWatch. Why has #SunspotCycle25 taken off.......? Well..... the #Terminator has arrived. In this thread we'll show some of the preliminary observations and discuss the implications for our forecast of #SunspotCycle25 strength. 
@leamonrj @rickyegeland Using small features in the Sun's corona [called "EUV BrightPoints"] we trace the progress of the Sun's magnetic #HaleCycle. Hale Cycles overlap, but come to an abrupt end - #terminator - at the Sun's equator. The #terminator causes the next Sunspot Cycle to blossom.
The BrightPoint density for 2021 showed a bald patch of BrightPoints at the Sun's equator that varied a lot over the year - until December 13, 2021. Will show you something cool about the bald patches later. We've been waiting on that big drop.
