Viewing archive of Tuesday, 18 April 2017

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Old sunspot region 2644 is back!

The remnants of old sunspot region 2644 (which was responsible for seven M-class solar flares during the first few days of this month) have now rotated back onto the earth-facing solar disk. It should receive sunspot number 2651 later today from the NOAA SWPC.

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Sunday, 1 February 2026

Complex sunspot region 4366

Monday, 19 January 2026

CME impact! S4 solar radiation storm

Sunday, 18 January 2026

X1.9 solar flare with earth-directed CME

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AR 4373 3 AR4366 972 Do the high-resolution sunspot counts point to more complex sunspots? 50 Feb 8-9 CMEs 8 Current Farside Activity 369

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