2021 April 20 Sun - AR12814, AR12815, AR12816, AR20817 and possible AR12818 and possible AR12819

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 20 Sun - AR12814, AR12815, AR12816, AR20817 and possible AR12818 and possible AR12819

文章 PTS » 週二 20 4月, 2021 10:47

2021 April 20 Sun - AR12814, AR12815, AR12816, AR20817 and possible AR12818 and possible AR12819

AR12814 is now located at (S22W87). The activities of this group has subsided, and no sunspot is visible.
AR12815 is located at (S21W63). No sunspot is visible.
AR12816 is today located at (S24E21). This group has been very active in the past 24 hours. At least 8 sunspots are visible, many come with penumbrae.
AR12817 is located at (N18W46) becomes very active. At least 10 sunspots are visible.
Meanwhile, a very active region shows up near the SE limb, at (S18E80). A large sunspot with penumbrae is visible, together with faculae.
Another AR east to AR12817, located at (N15W32) has also become more active. 2 small sunspots are visible.
sunspot count: group=4, sunspot=21, R=61

H-alpha image from Learmonth, taken at 00:00 UTC
White light image from SDO, taken at 00:57 UTC.
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MIB
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Re: 2021 April 20 Sun - AR12814, AR12815, AR12816, AR20817 and possible AR12818 and possible AR12819

文章 MIB » 週二 20 4月, 2021 12:08

[Good Job] [Good Job] 活躍番!

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Eddy So
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Re: 2021 April 20 Sun - AR12814, AR12815, AR12816, AR20817 and possible AR12818 and possible AR12819

文章 Eddy So » 週二 20 4月, 2021 20:22

[Good Job]

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