Journal ArticleDOI
Investigation of Quasi-periodic VLF Emissions and their relation to Geomagnetic Micropulsations
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TLDR
Long period VLF emission pulsations are called quasi-periodic (QP) emissions as discussed by the authors, the signal strength of which changes with time with a period longer than the two hop whistler group delay.Abstract:
VLF emissions the signal strength of which changes with time with a period longer than the two hop whistler group delay are called long period VLF emission pulsations1 or quasi-periodic (QP) VLF emissions2. About 400 QP events were observed in the VLF emission data recorded on chart at Byrd Station in Antarctica during 6 months (February–April, September–November 1964). VLF emissions were recorded in the frequency range 1–2.4 kHz and in a narrow band centred on 8 kHz. Additional observations were occasionally made at 400 Hz. QPs have been observed on the two lower frequency channels, though not necessarily simultaneously. They have never appeared on the 8 kHz channel. QPs were observed mostly when Byrd Station was on the daylight side of the Earth. Periods of QPs range from 10 s (the lowest limit resolvable) to about 2 min and occasionally up to 10 min. A QP event usually lasts for several tens of minutes. Sometimes it lasts for only a few minutes and sometimes for a few hours.read more
Citations
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Journal ArticleDOI
Periodic and quasiperiodic VLF emissions
Sergei Sazhin,Masashi Hayakawa +1 more
TL;DR: A review of periodic and quasiperiodic VLF emissions observed at ground-based stations and in the Earth's magnetosphere is presented in this paper, where emissions with periods below 10 s are divided into three main groups: periodic emissions, hisslers and pulsing hiss.
Journal ArticleDOI
Interrelation between VLF and ULF Emissions
TL;DR: In this article, a review of observations and theoretical works on the interrelation of VLF and ULF emissions is presented. But the authors do not discuss the relationship between the two phenomena.
Posted Content
Thunderstorms, lightning, sprites and magnetospheric whistler-mode radio waves
Devendraa Siingh,A. K. Singh,R.P. Patel,Rajesh Singh,Roohie Singh,Roohie Singh,Bhaskara Veenadhari,M. Mukherjee +7 more
TL;DR: In this article, the authors reviewed the electrification processes of a thunderstorm, lightning processes and their association with global electric circuit and climate and their morphological features and effects in the mesosphere.
Journal ArticleDOI
Thunderstorms, Lightning, Sprites and Magnetospheric Whistler-Mode Radio Waves
Devendraa Siingh,A. K. Singh,R.P. Patel,Rajesh Singh,Roohie Singh,Roohie Singh,Bhaskara Veenadhari,M. Mukherjee +7 more
TL;DR: In this article, the authors reviewed the electrification processes of a thunderstorm, lightning processes and their association with global electric circuit and climate and their morphological features and effects in the mesosphere.
Journal ArticleDOI
ELF/VLF wave propagation at subauroral latitudes: Conjugate observation between the ground and Van Allen Probes A
Claudia Martinez-Calderon,Kazuo Shiokawa,Yoshizumi Miyoshi,Kunihiro Keika,Mitsunori Ozaki,Ian Schofield,Martin Connors,Craig Kletzing,Miroslav Hanzelka,Miroslav Hanzelka,Ondrej Santolik,Ondrej Santolik,William S. Kurth +12 more
TL;DR: In this paper, the authors report simultaneous observation of ELF/VLF emissions, showing similar spectral and frequency features, between a VLF receiver at Athabasca (ATH), Canada, (L = 4.3) and Van Allen Probes A (Radiation Belt Storm Probes (RBSP) A).
References
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Journal ArticleDOI
Long‐period very low frequency emission pulsations
TL;DR: In this article, a hypothesis associating hydromagnetic waves with emitting particles is offered to account for the observed properties of the pulsations, which exhibits a latitude dependence, becoming longer at higher latitudes.