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About Philip

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    Minor flare

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    Cabin John, MD
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    Weather, Climate, Physics

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  1. FWIW, the AP index minimum tends to lag the sunspot minimum by 1-1.5 years, so the current values might not be applicable in time. I’m willing to bet the AP index minimum will not be reached until 2021.
  2. Given the ratio of SC24 polarity spots to SC25 polarity spots, I think it’s safe to say we have not reached solar minimum yet. That probably happens during the first half of 2020...just a guess though.
  3. From what I can derive, those spikes are probably erroneous. That was a near instantaneous jump/fallback without physical basis.
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