Jahresbericht des SONNE-Relativzahlnetzes 1997.

Details Jahresbericht des SONNE-Relativzahlnetzes 1997. Jahresbericht des SONNE-Relativzahlnetzes 1997.

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sonja..22...44b&link_type=abstract

Sonne, Jahrg. 22, Nr. 86, p. 44 - 45

Physics

Sunspot Numbers

Scientific paper

In 1997 the SONNE Network results were based on 17081 observations of
135 observers. The mean sunspot number rose from 7.3 in 1996 to 18.7 in
1997. The number of spotless disk days fell from 155 to 52.

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