Hejda, Pavel; Revallo, Miloš; Valach, Fridrich (2021): Magnetic storm observations from the Prague-Clementinum observatory on 1841-09-27 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.936876, In: Hejda, P et al. (2021): Data of magnetic storms and term-day observations from the Prague-Clementinum observatory (1839-1849) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.936921