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Characterizing Auroral‐Zone Absorption Based on Global Kp and Regional Geomagnetic Hourly Range Indices
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2020
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Source: Space Weather, 18(12)
[PDF-4.08 MB]
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Journal Title:Space Weather
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Description:Increased ionization in the auroral oval leads to the absorption of high ‐frequency radio waves in the auroral zone, or auroral absorption. Auroral absorption is typically characterized by global geomagnetic activity indices, such as the Kpindex. In this paper the hourly range of the magnetic field (HR) is examined as an alternative to the 3 ‐hrKpindex for describing the dynamic and localized features of auroral absorption represented by the hourly range of absorption (HRA). Kp, magnetometer, and riometer data were examined for a 3 ‐year period for stations spread across typical auroral latitudes. A general linear relationship was shown to exist between Kpand LOG 10(HRA) for Kp< 4; for Kp≥4 the correlation
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Source:Space Weather, 18(12)
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DOI:
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ISSN:1542-7390;1542-7390;
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Rights Information:CC BY-NC
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Compliance:Library
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