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On the solar activity during the year 1784

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Abstract

The solar observations performed by the Mexican astronomer J. A. Alzate during the year 1784 are analysed in this work. These observations are very valuable for the reconstruction of solar activity because Hoyt and Schatten (1998), who defined the Group Sunspot Number (R G), only found five observations during this year — all performed by J. C. Staudacher. Using conjointly the data provided by Alzate and Staudacher for 1784, one can determine a value of R G equal to 0.3±0.1 with eighty records for that year.

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References

  • Alzate, J. A.: 1831, Gaceta de literatura de México, 4 vol., Oficina del Hospital de San Pedro, Puebla, México.

    Google Scholar 

  • Argoli, A.: 1653, Pandosion sphaericum in quo singula in elementaribus regionibus, atque aethera, matematicé pertractantur, Typis Pauli Frambotti, Patavii.

    Google Scholar 

  • Aureliano, R., Buriano, A., and López, S.: 1996, Índice de las Gacetas de Literatura de México de José Antonio Alzate y Ramírez, Instituto Mora, México.

    Google Scholar 

  • Hoyt, D. V. and Schatten, K. H.: 1998, Solar Phys. 179, 189. Reprinted with figures in Solar Phys. 181, 491.

    Article  ADS  Google Scholar 

  • Krivova, N. A., Solanki, S. K., and Beer, J.: 2002, Astron. Astrophys. 396, 235.

    Article  ADS  Google Scholar 

  • McKinnon, J. A.: 1986, Sunspot Numbers 1610-1985, Report UAG-95, WDC-A, Boulder, CO.

  • Saladino, A.: 1990, Dos Científicos de la Ilustración Hispanoamericana: J. A. Alzate y F. J. de Caldas, Universidad Nacional Autónoma de México, México.

    Google Scholar 

  • Usoskin, I. G., Mursula, K., and Kovaltsov, G. A.: 2001, Astron. Astrophys. 370, L31.

    Article  ADS  Google Scholar 

  • Usoskin, I. G., Mursula, K., and Kovaltsov, G. A.: 2002, Geophys. Res. Lett. 29(24), 2183.

    Article  ADS  Google Scholar 

  • Usoskin, I. G., Mursula, K., and Kovaltsov, G. A.: 2003, Astron. Astrophys. 403, 743.

    Article  ADS  Google Scholar 

  • Vaquero, J. M.: 2003, The Observatory 123, 150.

    ADS  Google Scholar 

  • Waldmeier, M.: 1961, The Sunspot Activity in the Years 1610-1960, Schulthess & Company AG, Zürich.

    Google Scholar 

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  1. Departamento de Física, Escuela Politécnica, Universidad de Extremadura, Avda. de la Universidad s/n, 10071, Cáceres, Spain

    J.M. Vaquero

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  1. J.M. Vaquero
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Vaquero, J. On the solar activity during the year 1784. Solar Physics 219, 379–384 (2004). https://doi.org/10.1023/B:SOLA.0000022980.92482.13

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  • DOI: https://doi.org/10.1023/B:SOLA.0000022980.92482.13

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