Comparison of the Schumann resonance parameters in horizontal magnetic and electric fields according to observations on the Kola Peninsula

Roldugin, V. K.; Vasiljev, A. N.; Остапенко, А. А.

doi:10.1029/2006rs003475

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…The relation between B NS -E EW and B EW -E NS can be observed by looking at the spectra of the electric fields averaged in Figure 5. The presence of a horizontal component in the electric field implies a vertical component of the Poynting vector [Roldugin et al, 2006]. Another interesting behavior because of the orientation of the magnetometers can be observed.…”

Section: Toledo-redondo Et Al: Schumann Resonances From Mt Records Dmentioning

confidence: 79%

“…The first has its central value at around 7.8 Hz, the second mode moves around 14 Hz, and the third mode does so at around 20.5 Hz. It is interesting to see the correlation of the central frequency between the NS magnetic component and the EW electric component and vice versa [Roldugin et al, 2006]. In many campaigns, a shift is observed between B NS and B EW and, consequently, the same occurs with the electric components.…”

Section: Interseasonal Studymentioning

confidence: 99%

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Study of Schumann resonances based on magnetotelluric records from the western Mediterranean and Antarctica

et al. 2010

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[1] Eight independent magnetotelluric (MT) campaigns, carried out in the western Mediterranean area and Antarctica, have been analyzed with the aim of extracting information from Schumann resonances (SR). The advantages and drawbacks of MT data with respect to single-purpose fixed stations for SR research are evaluated. Two different methods of signal processing have been employed: spectral analysis through the fast Fourier transform (FFT) and Rescaled Range analysis (R/S), calculating the Hurst exponents. The first permitted a study of the source contributions, the effects caused by local changes in the observation area, interseasonal behavior, and the relations between electric and magnetic horizontal fields. The average central frequencies obtained for the first three resonances are 7.8, 14, and 20.5 Hz respectively, but there are fluctuations in them. These variations seem to respond to the characteristics of the principal active storms that generate the resonances. These frequency shifts are stronger for the second and third resonances. Owing to the broadband registering of MT, the second method of signal processing could be applied to the low noise signals from Antarctica with high resolution, revealing the persistent nature of SR. A numerical simulation indicates a way for inferring lightning rates from R/S analysis.

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Section: Toledo-redondo Et Al: Schumann Resonances From Mt Records Dmentioning

confidence: 79%

Section: Interseasonal Studymentioning

confidence: 99%

Study of Schumann resonances based on magnetotelluric records from the western Mediterranean and Antarctica

et al. 2010

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“…In this work, a comparison of SR values obtained using both types of fitting functions has been carried out. The linear terms are proposed in Roldugin et al () to describe the decreasing with frequency noise from input electronic circuits, with B < 0. Another possible origin for the linear terms is that, despite higher order modes are not present in the calibrated region, the effect of their low‐frequency tails cannot be disregarded.…”

Section: The Procedures Used In the Elf Station At Sierra Nevadamentioning

confidence: 99%

“…El Niño phenomenon is also studied in terms of its relationship with variations in SR frequencies (Sátori, ; Sátori & Zieger, ). SR studies based on long‐term measurements taken by different stations can be found in Kulak et al (), Ondrášková and Ševćík (, ), Ouyang et al (), Roldugin et al (, ), and Zhou et al ().…”

Section: Introductionmentioning

confidence: 99%

On the Need of a Unified Methodology for Processing Schumann Resonance Measurements

et al. 2018

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The monitoring of natural electromagnetic activity in the extremely low frequency range is considered as a means of obtaining global information on the lightning activity and other parameters concerning the state of the Earth's atmosphere. In this sense, the possible application of the study of Schumann resonances (SRs) to environmental monitoring systems has already been proposed in the recent past. However, the usual lack of details existing in the literature concerning the process of extracting SR parameters hinders the development of global networks intended for environmental purposes. In this paper, the methodology used to extract SR information from data measured at the Sierra Nevada extremely low frequency station, Spain, is described in detail. The process is split in three main parts: the determination of the amplitude spectrum from the low-amplitude noisy signal measured, the anthropogenic noise elimination and, finally, the calculation of an analytical function to fit the filtered amplitude spectrum from which SR parameters can be precisely defined. Some different options in the method are considered, and their effect on the SR results has been quantified. Significant differences in the final results have been observed in some of the options considered. As a conclusion of this work, it becomes clear that, if data from different research groups are to be shared and quantitatively compared, a standardization of the process is required or, at least, some details on the station and this process should be provided together with the SR results.

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“…Thus, the long‐period variations are not represented. Additionally, the available observational components are limited to the magnetic field data, in practice, since the Earth’s surface is not an ideal conductor (Gregori & Lanzerotti, 1979; Roldugin et al., 2006), clear SRs can still be recorded in the horizontal electric field, which can help us to more comprehensively analyze the SR phenomenon. In this paper, we analyze the quasi‐continuous data from 10 electromagnetic stations over the last 9 years to obtain the common aspects concerning SR seasonal and interannual variations and compare these signatures among each other and with the results reported by other authors.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and Interannual Variations in the Schumann Resonance Observed in the ELF Electromagnetic Networks in China

Han,

Tang,

Zhao

et al. 2023

JGR Atmospheres

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Based on 9 years of quasi‐continuous data observed at extremely low‐frequency electromagnetic stations, the long‐term variations of Schumann resonances (SRs) are compared and analyzed. We obtained two major parameters, namely the peak intensity and peak frequencies by Lorentz fitting and focus on their seasonal and interannual variations of the first three modes in 10 stations. Fengning station was taken as an example to show the seasonal variations of the intensity and frequency of each electromagnetic component and each mode of SR, with the intensity reaching the maximum in Northern Hemisphere summer and minimum in winter; while the frequency has an inverse phase. And the amount they change from summer to winter also shows different characteristics. The interannual variation of the 10 stations shows the unified law of change in the magnetic field than in the electric field. Finally, in conjunction with observations from other regions of the globe, the periodic intensity variation and migration of the lighting activities were considered the dominant controlling factors for the SR parameters. And by comparing with the El Niño index and solar X‐radiation flux, the strong links between SR parameters and the 11‐year solar cycle are confirmed, and intensity enhanced under the influence the 2015/2016 super E1 Niño phenomenon.

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Comparison of the Schumann resonance parameters in horizontal magnetic and electric fields according to observations on the Kola Peninsula

Cited by 4 publications

References 21 publications

Study of Schumann resonances based on magnetotelluric records from the western Mediterranean and Antarctica

Study of Schumann resonances based on magnetotelluric records from the western Mediterranean and Antarctica

On the Need of a Unified Methodology for Processing Schumann Resonance Measurements

Seasonal and Interannual Variations in the Schumann Resonance Observed in the ELF Electromagnetic Networks in China

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