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Tromsø Geophysical Observatory
Faculty of Science and Technology
University of Tromsø, Norway.
Geomagnetic Activity Index, ASCII output
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  Ny Ålesund
  Longyearbyen
  Hopen
  Bjørnøya
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  Tromsø
  Rørvik
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  Karmøy

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Check data coverage here

The geomagnetic index is the absolute mean deviation from daily mean H, in nT.
(-99 if no data)
Main geomag. page

Responsible editor: Chris Hall
Web & cgi programmer: Børre Heitmann Holmeslet
Last page update 1. Feb 2021