Schumann Resonances and Worldwide Thunderstorm Activity

Ogawa, T.; Tanaka, Yoshikazu; Yasuhara, Michihiro

doi:10.5636/jgg.21.447

Cited by 34 publications

(8 citation statements)

References 3 publications

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“…SR is a global resonance phenomenon in the spherical Earth‐ionosphere cavity as shown in Figure 1, which is triggered by lightning discharges in the equatorial thunderstorm‐active regions [ Bliokh et al , 1980]. Especially in the initial phase of SR study in 1960s and 1970s there were published a lot of papers on the SR observations for the study of global lightning activity [e.g., Polk , 1969; Sao et al , 1973; Ogawa et al , 1969; Jones and Kemp , 1970, 1971] and also on the study of ionospheric electron density [ Jones , 1969]. The second reason is closely associated with the finding of optical phenomena (red sprites, etc.)…”

Section: Introductionmentioning

confidence: 99%

FDTD analysis of ELF wave propagation and Schumann resonances for a subionospheric waveguide model

2003

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[1] The space formed by the ground and ionosphere is known to act as a resonator for extremely low frequency (ELF) waves. Lightning discharges trigger this global resonance, which is known as Schumann resonance. Even though the inhomogeneity (like day-night asymmetry, local perturbation, etc.) is important for such a subionospheric ELF propagation, the previous analyses have been always made by some approximations because the problem is too complicated to be analyzed by any exact full-wave analysis. This paper presents the first application of the conventional numerical FDTD method to such a subionospheric ELF wave propagation, in which any kind of inhomogeneity can be included in this analysis. However, the present paper is intended to demonstrate the workability of this method only for a uniform waveguide (without day-night asymmetry), by comparing the results from this method with those by the corresponding analytical method.

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Section: Introductionmentioning

confidence: 99%

FDTD analysis of ELF wave propagation and Schumann resonances for a subionospheric waveguide model

2003

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“…They are also often associated with horizontally extensive "spider lightning" discharges, long dendritic channels that may finger for many tens of kilometers along cloud base (1 2-1 7). Positive C G strokes are also disproportionately associated with electromagnetic "Q-burst" events in the ELF Schumann resonance (SR) hand (18,19), the largeamplitude ringing of the entire Earth-ionosphere cavity (20). The SR "continuous" spectra are believed to be driven hy the integrated effects of all global lightning, vvith Q-burst events identifiable as transient amplifications of the SR continuous sigl~al of up to 20 dB.…”

mentioning

confidence: 99%

“…The SR "continuous" spectra are believed to be driven hy the integrated effects of all global lightning, vvith Q-burst events identifiable as transient amplifications of the SR continuous sigl~al of up to 20 dB. These Q hursts, separated in time by minutes to hours, are thought to be excited by the largest lightning events on the planet (21,22).…”

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confidence: 99%

Sprites, ELF Transients, and Positive Ground Strokes

Boccippio

Williams

Heckman

et al. 1995

Science

372

252

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In two summertime mesoscale convective systems (MCSs), mesospheric optical sprite phenomena were often coincident with both large-amplitude positive cloud-to-ground lightning and transient Schumann resonance excitations of the entire Earth-ionosphere cavity. These observations, together with earlier studies of MCS electrification, suggest that sprites are triggered when the rapid removal of large quantities of positive charge from an areally extensive charge layer stresses the mesosphere to dielectric breakdown.

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“…Nickolaenko et al [1998] deduced parameters and indicators of thunderstorms from long-term records of ELF measurements for the first three SRs, where some of these periodicities were detected. Diurnal and seasonal variabilities of the SR parameters were analyzed by a large group of researchers, using measurements from terrestrial stations [Balser and Wagner, 1960;Ogawa et al, 1969;Nickolaenko and Rabinowicz, 1995;Sátori and Zieger, 1996;Märcz et al, 1997;Price and Melnikov, 2004;Ondrášková et al, 2007;Yang and Pasko, 2007;Sátori et al, 2009]. These works reported diurnal and semiannual periodicities related to the movement of the storms along an equatorial belt including both the Northern and Southern Hemispheres.…”

Section: Introductionmentioning

confidence: 99%

Solar storm effects during Saint Patrick's Days in 2013 and 2015 on the Schumann resonances measured by the ELF station at Sierra Nevada (Spain)

et al. 2016

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The effects of solar storms occurring during the days 17 to 19 March 2013 and 2015, St. Patrick's Day intervals, on Schumann resonances (SRs) have been studied. To do this, the experimental data recorded by the Juan Antonio Morente extremely low frequency station located at Sierra Nevada, Spain, have been processed in order to obtain hourly averaged information on the first three resonance modes. Results are compared with monthly averages of the SR data for each hour to detect deviations from the regular behavior. Evidence of significant changes in the peak amplitudes and frequencies of the SRs have been identified in the station's measurements and related to the coronal mass ejection impact in the magnetosphere, detected by in situ plasma measurements onboard spacecraft in the solar wind. However, the complicated nature of the Schumann resonances, dependent on multiple variables and subject to multiple unavoidable interferences (e.g., lightning or human radio sources), in conjunction with the complex magnetosphere‐ionosphere‐atmosphere coupling processes, makes it difficult to conclude that the observed deviations are exclusively due to the solar events mentioned. Results extracted from only two solar events cannot be considered as conclusive, and therefore, independent comparison with results reported by other research would seem advisable in future works on this subject.

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Schumann Resonances and Worldwide Thunderstorm Activity

Abstract: Electric vertical and horizontal NS and EW components of natural ELF electromagnetic noises were observed through a year from February, 1967, to January, 1968 Mean diurnal variations of the Schumann resonance power were obtained for the first three modes from noise spectra.The

Cited by 34 publications

References 3 publications

FDTD analysis of ELF wave propagation and Schumann resonances for a subionospheric waveguide model

FDTD analysis of ELF wave propagation and Schumann resonances for a subionospheric waveguide model

Sprites, ELF Transients, and Positive Ground Strokes

Solar storm effects during Saint Patrick's Days in 2013 and 2015 on the Schumann resonances measured by the ELF station at Sierra Nevada (Spain)

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