2021 April 23 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
AR12816 has crossed the meridian, and is today located at (S24W20). This group has been very active in the past 24 hours, with C1.0 flares. Only 1 sunspot is visible in H-alpha. Dark filaments from the magnetic centers are observed.
Most of AR12817 has turned to the backside. Some jets from this AR remain visible on the solar limb, Several C1.3-C1.4 flares are observed. Changes of the jets can be observed.
AR12818 is near the SE limb, at (S17E37). A large sunspot with penumbrae is visible. Bright plages are visible mostly to the east and south.
sunspot count: group=2, sunspot=10, R=30
Telescope: Lunt LS50T with B1200 blocking filter, and 2X barlow
Camera : ASI174MM
approximately north is up, east to the left
2021 April 23 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
2021 April 23 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
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Re: 2021 April 23 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
Images of AR12817
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Re: 2021 April 23 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
more of AR12817 and AR12818
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Re: 2021 April 23 Sun - solar surface in H-alpha, with AR12816, AR12817 and AR12818
Images of filaments
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