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Sunspot Group Area Index and the Waldmeier Rule

Published Online: 2026-04-08

Published Print: 2025-09

Authors

Osipova, A. A.

Nagovitsyn, Yu. A.

Fedoseeva, S. N.
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Text and Data Mining valid from 2025-09-01

Version of Record valid from 2025-09-01
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Article History

Received: 30 October 2025

Revised: 19 December 2025

Accepted: 19 December 2025

First Online: 8 April 2026

CONFLICT OF INTEREST

: The authors of this work declare that they have no conflicts of interest.

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