Geomagnetic field variations observed by INTERMAGNET during 4 total solar eclipses

Highlights

•We investigate variations of the geomagnetic field observed by INTERMAGNET during a total solar eclipse.

•We have confirmed characteristic increase of Y and decreases of X, Z and F during the solar eclipse.

•We have noted that variations at IPM in the southern hemisphere show decrease of Y and increases of X and Z.

•We discuss a possibility of exploring an effect of the solar eclipse using the wavelet analysis technique.

Abstract

… INTERMAGNET geomagnetic observatories over which the totality path passed during a total solar eclipse… during the solar eclipse characteristic increase of Y component of the geomagnetic field Y and decreases of X,Z and F are conspicuous… that variations of X,Y,Z and F observed during the total solar eclipse at Isla de Pascua Mataveri (Easter Island) in Chile (IPM) in the southern hemisphere show distinct decrease of Y and increases of X and Z on the contrary. We have found, however, that variations of X,Y,Z and F observed at Hornsund in Norway (HRN) at 77°N in latitude seem to be dominated by other geomagnetic occurrence since the solar activity is near maximum, and the geomagnetic field is disturbed on the day of eclipse…

Authors:
Jung-Hee Kim a, b, Heon-Young Chang a, b
a Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 41566, South Korea
b Research and Training Team for Future Creative Astrophysicists and Cosmologists (BK21 Plus Program), Daegu 41566, South Korea

Journal of Atmospheric and Solar-Terrestrial Physics
Volume 172, July 2018, Pages 107-116
https://doi.org/10.1016/j.jastp.2018.03.023

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Geomagnetic field variations observed by INTERMAGNET during 4 total solar eclipses

 

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