Resolution No.13 (1971): Contents of the Bulletin No.12 series

Reflecting the current needs of the scientific community, IAGA recommends that the following changes be made as soon practicable in the contents of the Bulletin No. 12 series:

  1. To include, in addition to the planetary indices Kp and its derivatives, the indices Dst, AE, Km, Kn, and Ks.
  2. To include data on magnetic storms, including reproductions of magnetograms for the H- component, reduced to the same time scale and comparable intensity scales, from 12 to 16 observatories for approximately ten storms each year.
  3. To discontinue the publication of K-indices from individual observatories in the Bulletin; instead these K-indices be stored in magnetic tape wherever practicable in the World Data Centers.