Subionospheric early VLF perturbations observed at Suva: VLF detection of red sprites in the day?
نویسندگان
چکیده
منابع مشابه
Early VLF perturbations observed in association with elves
VLF remote sensing is used to detect lowerionospheric electron density changes associated with a certain type of transient luminous events known as elves. Both groundand satellite-based observations of elves are analysed in relation to VLF data acquired at various receiver sites in Europe, the United States and Antarctica. Ground-based observations were performed during the EuroSprite2003 campa...
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We examine the effects on the mid-latitude D-region of two geomagnetic storms, the "Halloween storm" of late October 2003 and the 07 April 2000 storm, by means of the associated perturbations of several subionospheric VLF/LF signals propagating in both the northern and southern hemispheres. We use VLF/LF nighttime data from the Holographic Array for Ionospheric/Lightning Research (HAIL), locate...
متن کاملVLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes
It is recently recognized that the ionosphere is very sensitive to seismic effects, and the detection of ionospheric perturbations associated with earthquakes, seems to be very promising for short-term earthquake prediction. We have proposed a possible use of VLF/LF (very low frequency (3-30 kHz) /low frequency (30-300 kHz)) radio sounding of the seismo-ionospheric perturbations. A brief histor...
متن کاملBroadband VLF measurements of lightning-induced ionospheric perturbations
[1] Very low frequency (VLF) electromagnetic pulses radiated by lightning are an effective tool for probing the D region ionosphere. We detect and measure the D region ionospheric disturbances caused by the strong lightning flash by analyzing the broadband VLF spectrum from lightning that occurred just before and after a nearby intense lightningdischarge.Comparing themeasured electrondensity ch...
متن کاملTransmitter-induced modulation of subionospheric VLF signals: Ionospheric heating rather than electron precipitation
[1] The controlled keying of ground-based VLF transmitters with periodic on/off sequences allows the detection of weak but measurable cross-modulation effects on other subionospheric VLF probe signals used for VLF remote sensing. In this paper, we reexamine previously published and additional cases of such events and determine that the initial interpretations of such cross modulation as being d...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2008
ISSN: 0148-0227
DOI: 10.1029/2007ja012734