Ground Observations of Power Line Radiation Coupled to the Ionosphere and Magnetosphere

Park, C. G.; Helliwell, R. A.; Lefeuvre, F.

doi:10.1007/978-94-009-7063-2_11

Cited by 9 publications

(11 citation statements)

References 5 publications

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“…Fraser-Smith (1979, 1981 has speculated that the instability is suppressed by ''the radiation from electric power distribution system into the magnetosphere'' and this is likely the cause of the Pc1 weekend effect, but any concrete mechanism of such a suppression is not yet available. It is known that Thorne and Tsurutani (1979), Park et al (1983), Zaslavski (1996), Nunn et al (1999), Rodger et al (2000) and Ne˘mec et al (2006) have observed magnetospheric effects of the power line radiation, but how this radiation might induce the septan variation of the Pc1 wave activity remains a mystery. As one possible line of reasoning one may mention that the admixture of O + and/or He + ions in the magnetospheric plasma impedes the penetration of the Pc1 waves from the region of excitation towards the Earth (e.g., Guglielmi and Kangas, 2006).…”

Section: Discussionmentioning

confidence: 97%

The human impact on the Pc1 wave activity

Guglielmi

Зотов²

2007

Journal of Atmospheric and Solar-Terrestrial Physics

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Section: Discussionmentioning

confidence: 97%

The human impact on the Pc1 wave activity

Guglielmi

Зотов²

2007

Journal of Atmospheric and Solar-Terrestrial Physics

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“…Weak spectral lines with separations of 50 or 100 Hz were transmitted (Park and Chang, 1978;Park et al, 1983). Input wave intensities were only $0.1 pT, but strong lines were observed at Roberval with spectral broadening and triggered emissions.…”

Section: Nonlinear Eectsmentioning

confidence: 97%

“…Excellent groundbased observations of PLHR have been obtained from the magnetically conjugate pair Siple, Antarctica and Roberval, Quebec. (Helliwell et al, 1975;Park and Helliwell, 1981;Park et al, 1983). These papers report a frequent occurrence of magnetospheric lines with separations $120 Hz.…”

Section: Observational History Of Plhrmentioning

confidence: 97%

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On the nonlinear triggering of VLF emissions by power line harmonic radiation

Nunn¹,

Manninen²,

Turunen³

et al. 1999

Ann. Geophys.

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Abstract. VLF ground data from Porojarvi in N. Finland has been presented. Spectrograms reveal frequent occurrence of power line harmonic radiation (PLHR), originating from the Finnish power system and from heavy industrial plant. The radiation is seen to penetrate the magnetosphere since numerous occurrences of PLHR triggered emissions are seen. Risers predominate but fallers and hooks are also observed. A well-established 1D Vlasov simulation code has been used to simulate these emissions, using plausible magnetospheric data for a range of L values from L = 4 to L = 5.5. The code is able to reproduce risers fallers and hooks in close agreement with observations. The results shed considerable insight into the generation structure of both risers and fallers.

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“…Although the intensity of the PLHR events is generally rather low, they may trigger new electromagnetic emissions [Park and Helliwell, 1983;Nunn et al, 1999;Parrot and Němec, 2009;Parrot et al, 2014] and possibly contribute to electron precipitation [Tatnall et al, 1983;Bullough, 1995;Prakash et al, 2009]. Propagation of PLHR events from their source power line up to the satellite altitudes was considered by Kikuchi [1983], Ando et al [2002], Němec et al [2008], and Jing et al [2014].…”

Section: Introductionmentioning

confidence: 99%

Power line harmonic radiation observed by the DEMETER spacecraft at 50/60 Hz and low harmonics

2015

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We present a low‐altitude satellite survey of Power Line Harmonic Radiation (PLHR), i.e., electromagnetic waves radiated by electric power systems on the ground. We focus on frequencies corresponding to the first few harmonics of the base power system frequencies (50 Hz or 60 Hz, depending on the region). It is shown that the intensities of electromagnetic waves detected at these frequencies at an altitude of about 700 km are significantly enhanced above industrialized areas. The frequencies at which the wave intensities are increased are in excellent agreement with base power system frequencies just below the satellite location. We also investigate a possible presence of the weekend effect, i.e., if the situation is different during the weekends when the power consumption is lower than during the weekdays. Such an effect might be possibly present in the European region, but it is very weak. PLHR effects are less often detected in the summer, as the ionospheric absorption increases, and also, the radiation is obscured by lightning generated emissions. This difference is smaller in the U.S. region, in agreement with the monthly variations of the power consumption. The analysis of the measured frequency spectra reveals that although intensity increases at low odd harmonics of base power system frequencies are routinely detected, low even harmonics are generally absent. Finally, we verify the relation of PLHR intensities to the geomagnetically induced currents (GICs) proxy. It is shown that the PLHR intensity is increased at the times of higher GIC proxy values during the night.

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Ground Observations of Power Line Radiation Coupled to the Ionosphere and Magnetosphere

Cited by 9 publications

References 5 publications

The human impact on the Pc1 wave activity

The human impact on the Pc1 wave activity

On the nonlinear triggering of VLF emissions by power line harmonic radiation

Power line harmonic radiation observed by the DEMETER spacecraft at 50/60 Hz and low harmonics

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