Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 43, issue 1
Articles | Volume 43, issue 1
https://doi.org/10.5194/angeo-43-55-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-43-55-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 43, issue 1
Regular paper
 | 
15 Jan 2025
Regular paper |  | 15 Jan 2025

Investigation of the October effect in very low-frequency (VLF) signals

Marc Hansen, Daniela Banyś, Mark Clilverd, David Wenzel, Tero Raita, and Mohammed Mainul Hoque

Viewed

Total article views: 814 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
619 140 55 814 12 58 47
  • HTML: 619
  • PDF: 140
  • XML: 55
  • Total: 814
  • Supplement: 12
  • BibTeX: 58
  • EndNote: 47
Views and downloads (calculated since 11 Jan 2024)
Cumulative views and downloads (calculated since 11 Jan 2024)

Viewed (geographical distribution)

Total article views: 814 (including HTML, PDF, and XML) Thereof 814 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 22 Feb 2025
Download
Short summary
The amplitude of subionospheric very low-frequency (VLF) radio signals does not show a symmetrical behavior over the year, which would be expected from its dependency on the solar position. The VLF amplitude rather shows a distinctive sharp decrease around October, which is hence called the "October effect". This study is the first to systematically investigate this October effect, which shows a clear latitudinal dependency.
Read more
Share