2021 April 19 Sun - AR12814, AR12815, AR12816 and possible AR12817

各類觀測太陽的儀器介紹及太陽攝影 Solarmax
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PTS
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2021 April 19 Sun - AR12814, AR12815, AR12816 and possible AR12817

文章 PTS » 週一 19 4月, 2021 09:21

2021 April 19 Sun - AR12814, AR12815, AR12816 and possible AR12817

AR12814 is today located at (S22W73). The activities of this group has subsided, and no sunspot is visible.
AR12815 is located at (S21W49) only 1 small pore is visible.
AR12816 is today located at (S24E34). This group has been very active in the past 24 hours. AT least 7 sunspots are visible, many come with penumbrae.
Meanwhile, a small AR located at (N18W32) becomes active. At least 3 sunspots are visible. This may become AR12817.
sunspot count: group=3, sunspot=11, R=41

H-alpha image from Learmonth, taken at 01:00 UTC
White light image from SDO, taken at 23:39 UTC on 2021 April 18.
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Eddy So
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Re: 2021 April 19 Sun - AR12814, AR12815, AR12816 and possible AR12817

文章 Eddy So » 週一 19 4月, 2021 21:35

[Good Job]

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