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CME impact, M1.5 solar flare

The long duration C-class solar flare coronal mass ejection from two days ago arrived much earlier than expected. A distinct jump in the solar wind and IMF parameters were detected this morning at ACE which can only be the arrival of the 18 September coronal mass ejection.

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Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/09/28Kp5 (G1)
Number of spotless days in 2019:213
Current stretch spotless days:16

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