E3S Web of Conferences (Jan 2018)

Schumann resonance parameters at Kuju station during solar flares

  • Ikeda Akihiro,
  • Uozumi Teiji,
  • Yoshikawa Akimasa,
  • Fujimoto Akiko,
  • Abe Shuji

DOI
https://doi.org/10.1051/e3sconf/20186201012
Journal volume & issue
Vol. 62
p. 01012

Abstract

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We examined the Schumann resonance (SR) at low-latitude station KUJ by comparing with solar X-ray flux and solar proton flux at a geostationary orbit. For intense solar activity in October-November 2003, the reaction of the SR frequency to X-ray enhancement and SPEs was different. The SR frequency in H component increased at the time of the Xray enhancement. The response of SR seems to be caused by the increase of the electron density in the ionospheric D region which ionized by the enhanced solar X-ray flux. In the case of the SPEs, the SR frequency in D component decreased with enhancement of solar proton flux. We suggest that the SPEs caused the decrease of altitude on the ionopheric D region at high-latitude region, and the SR frequency decreased.