Influence of solar terminator passages on Schumann resonance parameters

A. Melnikov, C. Price*, G. Sátori, M. Füllekrug

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The Terminator Effect (TE) on extremely low frequency (ELF) electromagnetic waves or Schumann Resonances (SR) was investigated on the basis of observations during a number of years at different mid-latitude stations [Hollister (36.8° N, 121.5° W, SAO, USA), Mitzpe Ramon (30.5° N, 34.4° E, MR, Israel) and Nagycenk (47.6 N, 16.7 E, NC, Hungary)]. Definite shifts are observed in the SR magnetic and electric field characteristics during local sunrise and sunset. The terminator passage influences all magnetic field components at SAO, with more significant effects in the east-west component. At MR and NC stations notable effects were observed only in the vertical electric field. The TE is more pronounced in higher SR modes (14, 20 Hz) compared with the 8 Hz mode. Furthermore, the TE is more pronounced in the morning than evening, and more pronounced in winter than in summer. All these observations indicate that, in addition to diurnal-seasonal thunderstorm source motions, lateral ionospheric gradients across the terminator region have significant influences on ELF wave propagation.

Original languageEnglish
Pages (from-to)1187-1194
Number of pages8
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume66
Issue number13-14 SPEC. ISS.
DOIs
StatePublished - Sep 2004

Funding

FundersFunder number
Israel Science FoundationT034309, 183/00, TS 40848
Israel Science Foundation
Hungarian Science Foundation

    Keywords

    • ELF
    • Schumann resonance
    • Solar terminator

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