the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Singular variations in geomagnetic disturbance content at auroral latitudes
Abraham Abraham
Gangadharan Renuka
Cherian Ligi
Joseph Mathew Tiju
Anie Varghese Asha
S. B. Chandran Rakesh
Varghese Blessy
Abstract. The geomagnetic field consists of temporal variations induced primarily by the variations in the interplanetary magnetic field. This paper attempts to develop the latitude profile of fluctuations in the geomagnetic field for 34 observatories across the Earth during solar cycle 23 (1997–2008). It is noticed that the disturbance content is low for equatorial stations and high for auroral stations. We show that the latitude profile of disturbance exhibits `Knee’ behaviour, with the fluctuation content rising sharply beyond this critical latitude. The threshold latitude beyond which the stations are subject to high geomagnetic disturbance and hence become increasingly susceptible to associated geo-electric hazard is precisely determined near 52° latitude. The pattern of increasing geomagnetic fluctuations however ends around the auroral oval beyond where singular variations are observed.
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Preprint
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Abraham Abraham et al.
Interactive discussion


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RC1: 'Referee report of the manuscript "Singular variations in geomagnetic disturbance content at auroral latitudes" by A. Abraham et al.', Anonymous Referee #1, 03 Aug 2018
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RC2: 'Review: Singular Variations in Geomagnetic Disturbance Content at Aurora Latitudes. By Abraham', Anonymous Referee #2, 07 Aug 2018
Interactive discussion


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RC1: 'Referee report of the manuscript "Singular variations in geomagnetic disturbance content at auroral latitudes" by A. Abraham et al.', Anonymous Referee #1, 03 Aug 2018
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RC2: 'Review: Singular Variations in Geomagnetic Disturbance Content at Aurora Latitudes. By Abraham', Anonymous Referee #2, 07 Aug 2018
Abraham Abraham et al.
Abraham Abraham et al.
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