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The Auroral Observatory
(Nordlysobservatoriet)
Faculty of Science
University of Tromsø.
Realtime K-indices,  Limits
Limits for K-indices, Tromsø
& Longyearbyen:
  • K = 0 ->    0 - 19 nT.
  • K = 1 ->  20 - 39 nT.
  • K = 2 ->  40 - 79 nT.
  • K = 3 ->  80 - 159 nT.
  • K = 4 ->  160 - 279 nT.
  • K = 5 ->  280 - 479 nT.
  • K = 6 ->  480 - 799 nT.
  • K = 7 ->  800 - 1349 nT.
  • K = 8 ->  1350 - 1999 nT.
  • K = 9 ->  2000 -  and up...
Limits for K-indices,  Dombås
  • K = 0 ->    0 -    6 nT.
  • K = 1 ->    7 -   14 nT.
  • K = 2 ->   15 -  29 nT.
  • K = 3 ->   30 -  59 nT.
  • K = 4 ->   60 -  104 nT.
  • K = 5 ->  105  - 179 nT.
  • K = 6 ->  180 - 299 nT.
  • K = 7 ->  300 - 505 nT.
  • K = 8 ->  506 - 749 nT.
  • K = 9 ->  750 -  and up...
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Last Page Update 12. oct. 2001
Børre Heitmann Holmeslet