Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 35, issue 1
Articles | Volume 35, issue 1
https://doi.org/10.5194/angeo-35-139-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-35-139-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 35, issue 1
Regular paper
 | 
24 Jan 2017
Regular paper |  | 24 Jan 2017

A study of geomagnetic field variations along the 80° S geomagnetic parallel

Stefania Lepidi, Lili Cafarella, Patrizia Francia, Andrea Piancatelli, Manuela Pietrolungo, Lucia Santarelli, and Stefano Urbini

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Short summary
We study geomagnetic field variations from 1 min data at three Antarctic sites (Mario Zucchelli Station, Scott Base, Talos Dome) along the 80° S geomagnetic parallel. The daily variation depends on local time, due to the polar extension of midlatitude ionospheric currents. The ~1–7 mHz power maximizes around 12 MLT, close to the cusp, and the coherence does so between stations around 24 MLT. The wave propagation is consistent with a daytime solar wind source and with nighttime substorm processes.
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