By Sudhir Sharms | 2025-09-15
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active sun
On 09/15/2025 10:31 am by Patricio Leon | Santiago, Chile
new sunspot AR4217 is accompanying AR4216 in its crossing and seems that this new spot is carrying more dark cores in its wake that are still rotating the limb. Solar wind speed is about twice its normal speed at 800 km/s. SDO images are down for three last days
Newt 4.5"+ solar film, 1/640s ISO100
crop, B/C
