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Where to find historical data for kp index?


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These are in .txt format. If you download the readme, simply right click, rename, and add .txt to the end of the file name e.g. "README.txt"

The files separate into DSD, DPD, and DGD, representing Daily Solar/Particle/Geomagnetic data, respectively. You will want to download the DGD files to see the K-index. Use the readme file to help understand what you are looking at, and email the SWPC webmaster at the email given by the latest DGD.txt file download(it's near the top) if you have more questions about their products.

Edited by Christopher S.
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