Super solar particle event around AD775 was found

Zhou, D.; Wang, Chi; Zhang, Binquan; Zhang, Shenyi; Zhou, Ping; Sun, Yuzhuang; Liang, Jianing; Zhu, Guijie; Wu, Ji

doi:10.1007/s11434-014-0345-z

Cited by 13 publications

(26 citation statements)

References 8 publications

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“…Apart from the fact that we do not understand the two dates (both of which err by about one year), the duration and the hours of the sighting are not correct: The nearly full Moon on the true date of the sighting (AD 776 January 12) was visible at the relevant location from around 19:40 h local time. As the record specifies that the ten band of white qi were visible above the moon in the east, it is unlikely that the sighting could have started as early as 17-18 h, as claimed by Zhou et al (2014). The records are somewhat vague regarding the time when the phenomenon could no longer be seen.…”

Section: )mentioning

confidence: 96%

“…Zhou et al (2014) listed this particular event as as aurora for 11 December 774, i.e. 17 January AD 775 with a slightly different English translation.…”

Section: )mentioning

confidence: 99%

“…solar or lunar halos, fog, meteors, and so forth. In particular, misinterpretations and errors in dating call into question the conclusions of both Usoskin et al (2013) and Zhou et al (2014).…”

Section: The Possible Korean Comet In Ad 776 Junementioning

confidence: 99%

“…They list 14-16 different events as aurorae from AD 765 to 786, including some presumable aurorae observed in China from AD 770 to 775. More recently, Zhou et al (2014) claimed to have found worldwide super-aurorae connected with the suggested solar super-flare:…”

mentioning

confidence: 99%

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A review of East Asian reports of aurorae and comets circa AD 775

Chapman

Neuhäuser²,

Neuhäuser

et al. 2015

Astron Nachr

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Given that a strong 14C variation in AD 775 has recently been suggested to be due to the largest solar flare ever recorded in history, it is relevant to investigate whether celestial events observed around that time may have been aurorae, possibly even very strong aurorae, or otherwise related to the 14C variation (e.g. a suggested comet impact with Earth's atmosphere). We critically review several celestial observations from AD 757 to the end of the 770s, most of which were previously considered to be true, and in some cases, strong aurorae; we discuss in detail the East Asian records and their wording. We conclude that probably none among the events after AD 770 was actually an aurora, including the event in AD 776 Jan, which was misdated for AD 774 or 775; the observed white qi phenomenon that happened "above the moon" in the south-east was most probably a halo effect near the full moon - too late in any case to be related to the 14C variation in AD 774/5. There is another report of a similar (or identical) white qi phenomenon "above the moon", reported just before a comet observation and dated to AD 776 Jan; the reported comet observed by the Chinese was misdated to AD 776, but actually sighted in AD 767. Our critical review of East Asian reports of aurorae circa AD 775 shows some very likely true Chinese auroral displays observed and reported for AD 762; there were also several events prior to AD 771 that may have been aurorae but are questionable.Comment: 15 pages with 4 figure

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Section: )mentioning

confidence: 96%

“…Zhou et al (2014) listed this particular event as as aurora for 11 December 774, i.e. 17 January AD 775 with a slightly different English translation.…”

Section: )mentioning

confidence: 99%

Section: The Possible Korean Comet In Ad 776 Junementioning

confidence: 99%

mentioning

confidence: 99%

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A review of East Asian reports of aurorae and comets circa AD 775

Chapman

Neuhäuser²,

Neuhäuser

et al. 2015

Astron Nachr

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show abstract

“…Zhou D. et al 2014). By far the most systematic observations of the aurora are preserved in the history of China, Japan and Korea, and these form the main subject of the present section.…”

Section: The Aurora Borealismentioning

confidence: 80%

Astronomical evidence relating to the observed 14C increases in A.D. 774–5 and 993–4 as determined from tree rings

Stephenson

2015

Advances in Space Research

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Solar activity around AD 775 from aurorae and radiocarbon

Neuhäuser

Neuhäuser²

2015

Astron Nachr

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A large variation in 14 C around AD 775 has been considered to be caused by one or more solar super-flares within one year. We critically review all known aurora reports from Europe as well as the Near, Middle, and Far East from AD 731 to 825 and find 39 likely true aurorae plus four more potential aurorae and 24 other reports about halos, meteors, thunderstorms etc., which were previously misinterpreted as aurorae or misdated; we assign probabilities for all events according to five aurora criteria. We find very likely true aurorae in AD 743, 745, 762, 765, 772, 773, 793, 796, 807, and 817. There were two aurorae in the early 770s observed near Amida (now Diyarbakir in Turkey near the Turkish-Syrian border), which were not only red, but also green-yellow - being at a relatively low geo-magnetic latidude, they indicate a relatively strong solar storm. However, it cannot be argued that those aurorae (geo-magnetical latitude 43 to 50 deg, considering five different reconstructions of the geo-magnetic pole) could be connected to one or more solar super-flares causing the 14 C increase around AD 775: There are several reports about low- to mid-latitude aurorae at 32 to 44 deg geo-magnetical latitude in China and Iraq; some of them were likely observed (quasi-)simultaneously in two of three areas (Europe, Byzantium/Arabia, East Asia), one lasted several nights, and some indicate a particulary strong geo-magnetic storm (red colour and dynamics), namely in AD 745, 762, 793, 807, and 817 - always without 14 C peaks. We use 39 likely true aurorae as well as historic reports about sunspots together with the radiocarbon content from tree rings to reconstruct solar activity: From about AD 733 to 823, we see at least nine Schwabe cycles ...Comment: 24 pages with 1 table and 2 figures, paper to appear in Astronomical Notes 24 Apr 201

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Super solar particle event around AD775 was found

Cited by 13 publications

References 8 publications

A review of East Asian reports of aurorae and comets circa AD 775

A review of East Asian reports of aurorae and comets circa AD 775

Astronomical evidence relating to the observed 14C increases in A.D. 774–5 and 993–4 as determined from tree rings

Solar activity around AD 775 from aurorae and radiocarbon

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