Resolution No.2 (1969): Continued derivation of the Dst, AE, Kn, Ks and Km indices

The IAGA, considering that the indices Dst (equatorial ring current), AE (auroral electrojet) and Kn, Ks, Km (semiplanetary indices for N- and S- hemispheres and their main value) have been determined for recent years and recognising that they provide new condensed information on the state of disturbances of the geophysical field recommends the continued determination of these indices and urgently requests those observatories which are selected for this purpose to send their data promptly in order to make possible regular and early monthly publications.

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