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Sporadic aurora from Spain
Earth, Planets and Space volume 59, pages e49–e51 (2007)
Some authors have shown recently that “sporadic auroras” have occurred at relatively low latitude when the geomagnetic activity is quiet or moderate. Here we present and analyze a case of “sporadic aurora” observed from Spain on the 29 December 1845 and compare its low geomagnetic activity with other three aurorae also observed in Spain in mid-19th century.
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Vaquero, J.M., Trigo, R.M. & Gallego, M.C. Sporadic aurora from Spain. Earth Planet Sp 59, e49–e51 (2007). https://doi.org/10.1186/BF03352061
- Sporadic aurora
- low geomagnetic activity