Temporal and Spatial Evolutions of a Large Sunspot Group and Great Auroral Storms around the Carrington Event in 1859

Hisashi Hayakawa, Yusuke Ebihara, David M. Willis, Shin Toriumi, Tomoya Iju, Kentaro Hattori, Matthew N. Wild, Denny M. Oliveira, Ilaria Ermolli, José R. Ribeiro, Ana P. Correia, Ana I. Ribeiro, Delores J. Knipp

(Submitted on 27 Aug 2019)

The Carrington event is considered to be one of the most extreme space weather events in observational history within a series of magnetic storms caused by extreme interplanetary coronal mass ejections (ICMEs) from a large and complex active region (AR) emerged on the solar disk. In this article, we study the temporal and spatial evolutions of the source sunspot active region and visual aurorae, and compare this storm with other extreme space weather events on the basis of their spatial evolution. Sunspot drawings by Schwabe, Secchi, and Carrington describe the position and morphology of the source AR at that time. Visual auroral reports from the Russian Empire, Iberia, Ireland, Oceania, and Japan fill the spatial gap of auroral visibility and revise the time series of auroral visibility in mid to low magnetic latitudes (MLATs). The reconstructed time series is compared with magnetic measurements and shows the correspondence between low to mid latitude aurorae and the phase of magnetic storms. The spatial evolution of the auroral oval is compared with those of other extreme space weather events in 1872, 1909, 1921, and 1989 as well as their storm intensity, and contextualizes the Carrington event, as one of the most extreme space weather events, but likely not unique.

Comments: main text 25 pages, reference 10 pages, 7 figures, and 1 table, accepted for publication in Space Weather

Subjects: Solar and Stellar Astrophysics (astro-ph.SR); Earth and Planetary Astrophysics (astro-ph.EP); Space Physics (physics.space-ph)

Journal reference: Space Weather, 2019

DOI: 10.1029/2019SW002269

Cite as: arXiv:1908.10326 [astro-ph.SR] (or arXiv:1908.10326v1 [astro-ph.SR] for this version)

Submission history

From: Hisashi Hayakawa  

[v1] Tue, 27 Aug 2019 16:57:16 UTC (1,442 KB)

https://arxiv.org/abs/1908.10326

Space Weather