An Optical Atmospheric Phenomenon Observed in 1670 over the City of Astrakhan Was Not a Mid-Latitude Aurora
It has recently been claimed (Zolotova and Ponyavin Solar Phys., 291, 2869, 2016; ZP16 henceforth) that a mid-latitude optical phenomenon, which took place over the city of Astrakhan in July 1670, according to Russian chronicles, were a strong aurora borealis. If this were true, it would imply a very strong or even severe geomagnetic storm during the quietest part of the Maunder minimum. However, as we argue in this article, this conclusion is erroneous and caused by a misinterpretation of the chronicle record. As a result of a thorough analysis of the chronicle text, we show that the described phenomenon occurred during the daylight period of the day (“the last morning hour”), in the south (“towards noon”), and its description does not match that of an aurora. The date of the event was also interpreted incorrectly. We conclude that this phenomenon was not a mid-latitude aurora, but an atmospheric phenomenon, the so-called sundog (or parhelion), which is a particular type of solar halo. Accordingly, the claim of a strong mid-latitude aurora during the deep Maunder Minimum is not correct and should be dismissed.
KeywordsSolar activity Sunspots Solar observations Solar cycle
- Buganov, V.I., Rybakov, B.A. (eds.): 1968, Complete Collection of Russian Chronicles. Chroniclers of the Last Quarter of the XVII Century 31, Nauka, Moscow. Google Scholar
- Charbonneau, P.: 2010, Dynamo models of the solar cycle. Living Rev. Solar Phys. 7(3). http://www.livingreviews.org/lrsp-2010-3.
- Greenler, R.: 1990, Rainbows, Halos and Glories, Cambridge University Press, Cambridge. Google Scholar
- Kostomarov, N.I.: 1994, Rebelion of Stepan Razin (in Russian), Charli, Moscow. Google Scholar
- Schperk, F.F.: 1895, Essays on the Astrakhanskyi District. Climate of the City of Astrakhan and Astrakhanskiy District (in Russian), Tip. Imp. Akad. Nauk, St. Petersburg. Google Scholar
- Steinhilber, F., Abreu, J.A., Beer, J., Brunner, I., Christl, M., Fischer, H., Heikkilae, U., Kubik, P.W., Mann, M., McCracken, K.G., Miller, H., Miyahara, H., Oerter, H., Wilhelms, F.: 2012, 9,400 years of cosmic radiation and solar activity from ice cores and tree rings. Proc. Natl. Acad. Sci. USA 109(16), 5967. DOI. ADSCrossRefGoogle Scholar
- Usoskin, I.G., Arlt, R., Asvestari, E., Hawkins, E., Käpylä, M., Kovaltsov, G.A., Krivova, N., Lockwood, M., Mursula, K., O’Reilly, J., Owens, M., Scott, C.J., Sokoloff, D.D., Solanki, S.K., Soon, W., Vaquero, J.M.: 2015, The Maunder minimum (1645 – 1715) was indeed a grand minimum: a reassessment of multiple datasets. Astron. Astrophys. 581, A95. DOI. ADS. ADSCrossRefGoogle Scholar