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Peer-reviewedCC BY 4.0Earth and Space Science

Schumann Resonance Frequency Increase Following Recurrent Solar Wind Stream Onsets

  • J. Tacza1
  • G. Sátori2
  • A. Neska1
  • T. Raita3
  • T. Bozoki2,4,5
5 affiliations
  1. 1Institute of Geophysics Polish Academy of Sciences Warsaw Poland
  2. 2HUN‐REN Institute of Earth Physics and Space Science Sopron Hungary
  3. 3Sodankylä Geophysical Observatory University of Oulu Sodankylä Finland
  4. 4Karman Space Center Obuda University Budapest Hungary
  5. 5Kandó Kálmán Faculty of Electrical Engineering Obuda University Budapest Hungary
Open at sourcePDFDOICite

Abstract

Recurrent high‐speed streams and corotating interaction regions (HSS/CIRs) are common solar‐wind drivers, but their influence on Schumann resonance (SR) frequencies remains poorly quantified. We analyzed 173 threshold‐defined HSS/CIR proxy onsets using superposed epoch composites, bootstrap uncertainty, and a month‐matched random‐epoch null model. At the polar Hornsund station (corrected geomagnetic latitude 74.16°N), the apparent first‐mode SR frequency exhibits a positive response on days 0 to +1 relative to onset and is unlikely under the month‐matched random‐epoch null. A similar positive response appears at the high‐latitude Ivalo (65.14°N) and Rovaniemi (63.69°N) stations, with the same ordering under matched‐support restriction. Event‐level scaling with baseline‐relative Kp, AE, and Vsw impulses shows the clearest organization by Kp, consistent support from AE, and a positive but less diagnostic relation with Vsw. The Kp/AE organization strengthened after excluding ICME‐overlap events. Overall, HSS/CIR proxy onsets are followed by a small but repeatable first‐mode SR response that is statistically supported, reproducible across high‐latitude stations, and organized more clearly by geomagnetic coupling than by solar‐wind speed alone.

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Cite

BibTeXRIS
BibTeX
@article{tacza2026schumann,
  title = {{Schumann Resonance Frequency Increase Following Recurrent Solar Wind Stream Onsets}},
  author = {J. Tacza and G. Sátori and A. Neska and T. Raita and T. Bozoki},
  journal = {Earth and Space Science},
  year = {2026},
  month = oct,
  doi = {10.1029/2026ea005271},
  url = {https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026EA005271},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Schumann Resonance Frequency Increase Following Recurrent Solar Wind Stream Onsets
AU  - J. Tacza
AU  - G. Sátori
AU  - A. Neska
AU  - T. Raita
AU  - T. Bozoki
PY  - 2026
DA  - 2026/10/10
JO  - Earth and Space Science
DO  - 10.1029/2026ea005271
UR  - https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026EA005271
AB  - Recurrent high‐speed streams and corotating interaction regions (HSS/CIRs) are common solar‐wind drivers, but their influence on Schumann resonance (SR) frequencies remains poorly quantified. We analyzed 173 threshold‐defined HSS/CIR proxy onsets using superposed epoch composites, bootstrap uncertainty, and a month‐matched random‐epoch null model. At the polar Hornsund station (corrected geomagnetic latitude 74.16°N), the apparent first‐mode SR frequency exhibits a positive response on days 0 to +1 relative to onset and is unlikely under the month‐matched random‐epoch null. A similar positive response appears at the high‐latitude Ivalo (65.14°N) and Rovaniemi (63.69°N) stations, with the same ordering under matched‐support restriction. Event‐level scaling with baseline‐relative Kp, AE, and Vsw impulses shows the clearest organization by Kp, consistent support from AE, and a positive but less diagnostic relation with Vsw. The Kp/AE organization strengthened after excluding ICME‐overlap events. Overall, HSS/CIR proxy onsets are followed by a small but repeatable first‐mode SR response that is statistically supported, reproducible across high‐latitude stations, and organized more clearly by geomagnetic coupling than by solar‐wind speed alone.
SN  - 2333-5084
SN  - 2333-5084
ER  -