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By P Gosselin on 25. May 2018
The Sun in April 2018 By Frank Bosse and Fritz Vahrenholt (Translated, edited and summarized by P Gosselin) The sun was inactive in April, as we currently find ourselves in the minimum between solar cycle (SC) 24 and the coming solar cycle 25. The recorded mean sunspot number (SSN) for April was 8.9, which is only […]