Keywords: K-index.svg K-index Own using Gnumeric 1 10 17 and Inkscape 0 48 3 1 on Linux based on data from http //spidr ngdc noaa gov/spidr/help do group geomInd NOAA Space Physics Interactive Data Resource SPIDR SV1XV 2012-09-17 Geomagnetism Cc-zero |