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How unusual is today's solar activity? (reply)

Nature volume 436, pages E4–E5 (2005)Cite this article

Abstract

Muscheler et al.1 claim that the solar activity affecting cosmic rays was much higher in the past than we deduced2 from 14C measurements. However, this claim is based on a problematic normalization and is in conflict with independent results, such as the 44Ti activity in meteorites and the 10Be concentration in ice cores.

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References

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Author information

Authors and Affiliations

  1. Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, 37191, Germany

    S. K. Solanki & M. Schüssler

  2. Sodankylä Geophysical Observatory (Oulu unit), University of Oulu, Oulu, 90014, Finland

    I. G. Usoskin

  3. Heidelberger Akademie der Wissenschaften, Institut für Umweltphysik, Heidelberg, 69120, Germany

    B. Kromer

  4. Department of Surface Waters, Eidgenössische Anstalt für Wasser-versorgung Abwasserreinigung und Gewässerschutz (EAWAG), Dübendorf, 8600, Switzerland

    J. Beer

Authors
  1. S. K. Solanki
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  2. I. G. Usoskin
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  3. B. Kromer
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  4. M. Schüssler
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  5. J. Beer
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Correspondence to S. K. Solanki.

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Solanki, S., Usoskin, I., Kromer, B. et al. How unusual is today's solar activity? (reply). Nature 436, E4–E5 (2005). https://doi.org/10.1038/nature04046

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