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Selection of magnetograms

Magnetogram selection

Observatory :     Date :

Compare with observatory :     Plot :   Components    Differences

Components :  X   Y   Z   F   dF    Magnetic activity indices :   K    K(Asm)1)    E2)

Plot size (in pixels) :     Plot height (nT) :

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K(Asm) and E indices are calculated according to algorithms published in papers:

1. Nowozynski, K., Ernst, T. and Jankowski, J., 1991. Adaptive smoothing method for computer derivation of K-indices, Geophys. J. Int., 104, pp. 85-93.
2. Reda, J. and Jankowski, J., 2004. Three-hour activity index based on power spectra estimation, Geophys. J. Int., 157, pp. 141-146.