URL details: www.theusner.eu/terra/aurora/kp_archive.php

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URL title: Kp- and Kpa-index archive - Homepage of Michael Theusner
URL paragraphs: Kp-index and Kpa-index archive (1868 to present) Kp and Kpa — planetary 3-hourly indices of geomagnetic activity Data from GFZ Potsdam (Kp-index from 1932-present) and NOAA NCEI ( AA-index converted to Kpa from 1868-1931) Sunspot numbers from WDC-SILSO ,
URL last crawled: 2022-12-21
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